#### What type of PR is this?
/kind improvement
/area core
/milestone 2.20.x
#### What this PR does / why we need it:
为注册用户增加用户名和密码长度校验
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/area core
/kind cleanup
/milestone 2.20.x
#### What this PR does / why we need it:
重新生成 OpenAPI 定义和 API Client，在 https://github.com/halo-dev/halo/pull/6488 中忘了重新生成。
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind cleanup
/area core
#### What this PR does / why we need it:
This PR bumps all version to 2.20.0 to prepare for next development.
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind api-change
/kind feature
/area core
#### What this PR does / why we need it:
see #2335
增加将第三方资源转存为附件资源的接口。
`/apis/api.console.halo.run/v1alpha1/attachments/-/upload-from-url`
UC:
`/apis/uc.api.content.halo.run/v1alpha1/attachments/-/upload-from-url`
其中参数为
```json
{
"url": "string",
"filename": "string",
"groupName": "string",
"policyName": "string"
}
```
#### How to test it?
测试能否将第三方接口的资源保存至附件中。
测试各类附件，例如图片、视频、文本等。
#### Does this PR introduce a user-facing change?
```release-note
增加通过链接转存第三方资源至附件库的接口
```
#### What type of PR is this?
/kind improvement
/area core
#### What this PR does / why we need it:
This PR refactors searching roles by using index mechanism to speed up every request and fix the problem of not being able to grant roles to users sometimes.
#### Which issue(s) this PR fixes:
Fixes#5807
Fixes https://github.com/halo-dev/halo/issues/4954
Fixes https://github.com/halo-dev/halo/issues/5057
#### Does this PR introduce a user-facing change?
```release-note
修复有时无法给用户赋权限的问题
```
#### What type of PR is this?
/kind cleanup
/area core
#### What this PR does / why we need it:
This is a regular updates after a new release.
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/kind cleanup
/area core
#### What this PR does / why we need it:
Regenerate API docs and client to prevent unrelated changes from other PRs.
#### Does this PR introduce a user-facing change?
```release-note
None
```
#### What type of PR is this?
/area core
/kind api-change
/milestone 2.17.x
#### What this PR does / why we need it:
移除内置的页面静态缓存功能，后续将由 https://github.com/halo-sigs/plugin-page-cache 插件提供。
#### Which issue(s) this PR fixes:
Fixes#5639
#### Special notes for your reviewer:
#### Does this PR introduce a user-facing change?
```release-note
移除内置的页面静态缓存功能，后续由 https://github.com/halo-sigs/plugin-page-cache 插件提供。
```
guqing