Signed-off-by: Ryan Wang <i@ryanc.cc>
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#### What type of PR is this?
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/kind feature
/milestone 2.0
#### What this PR does / why we need it:
添加上传插件的支持。
see https://github.com/halo-dev/halo/pull/2271
#### Which issue(s) this PR fixes:
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None
#### Screenshots:
<img width="1156" alt="image" src="https://user-images.githubusercontent.com/21301288/180416186-49c56971-c0b9-4761-ae9e-8531e433a9c0.png">
<img width="1156" alt="image" src="https://user-images.githubusercontent.com/21301288/180416203-e4b35266-3645-497b-9d08-d6407b2dd7f7.png">
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#### Special notes for your reviewer:
可以使用以下插件仓库中 Actions 构建的 JAR 测试：
- https://github.com/halo-sigs/plugin-links/actions
- https://github.com/halo-sigs/plugin-meilisearch/actions
- https://github.com/halo-sigs/plugin-template/actions
/cc @halo-dev/sig-halo-admin
/cc @halo-dev/sig-halo
#### Does this PR introduce a user-facing change?
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```release-note
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Ryan Wang
