On the Halo side, PR https://github.com/halo-dev/halo/pull/3740 has already added two new methods (`getSharedURL` and `getPermalink`) into AttachmentHandler. Now It's time to implement these two methods so that users can correctly and easily use these two methods.
This PR mainly implements [new AttachmentHandler](11a5807682/api/src/main/java/run/halo/app/core/extension/attachment/endpoint/AttachmentHandler.java). At the same time, I also refactored the build script for a better development experience.
Please note that, those changes might not influence compatibility with Halo 2.0.0. You can have test against Halo 2.0.0 manually.
/kind feature
```release-note
支持获取分享链接和永久链接
```
