#### What type of PR is this?
/kind feature
/area core
/milestone 2.0
#### What this PR does / why we need it:
- Add finalizers field into metadata to let controller do some works before deleting
- Implement a simple garbage collector to collect deletable extensions
Garbage collector controller is a special controller, which will watch extensions with any GVK instead of specific type. So we have to customize the controller parameters entirely.
#### Which issue(s) this PR fixes:
Fixes#2307
#### Special notes for your reviewer:
How to test?
- Delete without finalizers
1. Create an extension and check it
2. Delete it and check it again
- Delete with finalizers
1. Create an extension and update it with finalizers
2. Delete it and checkout it
4. You will see the extension with finalizers not deleted
5. Update it without finalizers and check it again
#### Does this PR introduce a user-facing change?
```release-note
None
```
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#### What type of PR is this?
/kind feature
/milestone 2.0
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#### What this PR does / why we need it:
文章管理相关模块。适配 https://github.com/halo-dev/halo/pull/2326
#### Which issue(s) this PR fixes:
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Fixes https://github.com/halo-dev/halo/issues/2322
#### Screenshots:
// pending
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// pending
#### Does this PR introduce a user-facing change?
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#### What type of PR is this?
/kind feature
/milestone 2.0
/area core
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#### What this PR does / why we need it:
新增文章模块的基本实现
提供创建文章，更新草稿和发布文章三个 API
#### Which issue(s) this PR fixes:
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A part of #2322
#### Special notes for your reviewer:
/cc @halo-dev/sig-halo
#### Does this PR introduce a user-facing change?
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#### What type of PR is this?
/kind improvement
/area core
/milestone 2.0
/release-note-none
#### What this PR does / why we need it:
Extract generateListResultClass into ListResult to make it easy to use in other places.
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#### What type of PR is this?
/kind feature
/milestone 2.0
/area core
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#### What this PR does / why we need it:
目前插件开发模式允许配置项目目录，但必须配置到项目目录的上一级，并不友好
此 PR 提供了 fixedPluginPath 选项允许在开发模式时配置它为插件项目目录
在开发 gradle 插件时更易于通过配置此选项来加载插件
#### Which issue(s) this PR fixes:
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Fixes #
#### Special notes for your reviewer:
/cc @halo-dev/sig-halo
#### Does this PR introduce a user-facing change?
<!--
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#### What type of PR is this?
/kind feature
/kind improvement
/area core
/milestone 2.0
#### What this PR does / why we need it:
1. Replace JDBC to R2DBC
2. Make our system fully reactive
#### Which issue(s) this PR fixes
Fixes#2308
#### Special notes for your reviewer:
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind feature
/area core
/kind api-change
/milestone 2.0
#### What this PR does / why we need it:
Add Menu and MenuItem Extension to realise multi menu feature.
#### Does this PR introduce a user-facing change?
```release-note
添加菜单功能
```
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#### What type of PR is this?
/kind feature
/milestone 2.0
/area core
/kind api-change
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#### What this PR does / why we need it:
新增主题卸载 endpoint
#### Which issue(s) this PR fixes:
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Fixes#2306
#### Special notes for your reviewer:
/cc @halo-dev/sig-halo
#### Does this PR introduce a user-facing change?
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None
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Signed-off-by: Ryan Wang <i@ryanc.cc>
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#### What type of PR is this?
/kind feature
/milestone 2.0
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#### What this PR does / why we need it:
新增主题上传支持，适配 https://github.com/halo-dev/halo/pull/2302
/hold until https://github.com/halo-dev/halo/pull/2302 merge
#### Which issue(s) this PR fixes:
<!--
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Fixeshalo-dev/halo#2291
#### Screenshots:
<img width="1920" alt="image" src="https://user-images.githubusercontent.com/21301288/182769346-4445639c-dd82-496c-9a1b-e241098fb272.png">
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#### Special notes for your reviewer:
/cc @halo-dev/sig-halo-admin
#### Does this PR introduce a user-facing change?
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#### What type of PR is this?
/kind feature
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/milestone 2.0
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#### What this PR does / why we need it:
新增主题安装功能，endpoint：POST /apis/api.halo.run/v1alpha1/themes/install
限制：主题不允许重复安装，重复安装属于更新功能
#### Which issue(s) this PR fixes:
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Fixes#2291
#### Special notes for your reviewer:
/cc @halo-dev/sig-halo
#### Does this PR introduce a user-facing change?
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Signed-off-by: Ryan Wang <i@ryanc.cc>
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#### What this PR does / why we need it:
为主题添加设置表单支持，适配 https://github.com/halo-dev/halo/pull/2299
/hold until https://github.com/halo-dev/halo/pull/2299 merge
#### Which issue(s) this PR fixes:
Fixes https://github.com/halo-dev/halo/issues/2298
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#### Screenshots:
|<img width="1564" alt="image" src="https://user-images.githubusercontent.com/21301288/182583412-f14a890e-25ee-418c-b921-0924f94c0d1b.png">|<img width="1564" alt="image" src="https://user-images.githubusercontent.com/21301288/182583525-26fe165c-2dd0-4068-9d52-659dc626367a.png">|
| ---- | ---- |
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#### Special notes for your reviewer:
测试方式：
1. Halo 后端需要 checkout 到 https://github.com/halo-dev/halo/pull/2299 分支。
2. 将被测主题放置在 `~/halo-next/themes`，可以使用 https://github.com/ruibaby/theme-astro-starter
3. 使用主题内的 `theme.yaml` 和 `settings.yaml` 创建 `Theme` 和 `Setting` 的资源。
4. admin 需要 checkout 到当前 PR 的分支，启动开发服务之后在主题列表即可启用该主题。
5. 测试保存和更新主题配置。
#### Does this PR introduce a user-facing change?
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None
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#### What type of PR is this?
/kind improvement
/area core
/milestone 2.0
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#### What this PR does / why we need it:
主题支持配置 settingName 和 configMapName
#### Which issue(s) this PR fixes:
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Fixes#2298
#### Special notes for your reviewer:
/cc @halo-dev/sig-halo
#### Does this PR introduce a user-facing change?
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Ryan Wang
