ci: laf doc preview during pr

[aFlyBird0]

Note: Blocked by some issues now

Summary

complete #1063

• open/reopen PR: create bucket & website, deploy
• update PR: redeploy
• close PR: delete

Details（Screenshots）

link: aFlyBird0#4

Blocked Info

1. blocked by [bug/cli] Failed to delete website with Laf CLI #1469
2. GitHub Action Secrets to be added @maslow （Since informing users about the access address is necessary during the preview, app ID and other information will be exposed. It is recommended to use a completely new, low-privileged application.）

${{ secrets.LAF_CI_DOCS_PREVIEW_PAT }}
${{ secrets.LAF_CI_DOCS_PREVIEW_APPID }}
${{ secrets.LAF_CI_DOCS_PREVIEW_API_URL }}

[aFlyBird0]

Currently, each PR has its own separate bucket, which makes automatic DNS configuration challenging. If we place all the PRs into different directories within the same bucket, we can avoid exposing the app ID (by manually configuring DNS). However, this approach would make the implementation relatively more complex.

However, block by #1464

中文版评论：

目前是每个pr单独一个bucket，所以会导致dns难以自动配置。如果我们将所有的pr放到同一个bucket的不同目录中，就可以避免appid暴露（手动设置一次dns）。不过这样的话，实现也会相对复杂些。

阻塞于：#1464

cc @maslow