Move `public/*` to `public/assets/*`
Some old PRs (like #15219) introduced inconsistent directory system.
For example: why the local directory "public" is accessed by
`http://site/assets`? How to serve the ".well-known" files properly in
the public directory?
For convention rules, the "public" directory is widely used for the
website's root directory. It shouldn't be an exception for Gitea.
So, this PR makes the things consistent:
* `http://site/assets/foo` means `{CustomPath}/public/assets/foo`.
* `{CustomPath}/public/.well-known` and `{CustomPath}/public/robots.txt`
can be used in the future.
This PR is also a prerequisite for a clear solution for:
* #21942
* #25892
* discourse.gitea.io: [.well-known path serving custom files behind
proxy?](https://discourse.gitea.io/t/well-known-path-serving-custom-files-behind-proxy/5445/1)
This PR is breaking for users who have custom "public" files (CSS/JS).
After getting approvals, I will update the documents.
----
## ⚠️ BREAKING ⚠️
If you have files in your "custom/public/" folder, please move them to
"custom/public/assets/".
---------
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: Giteabot <teabot@gitea.io>
* fix apple-touch-icon, regenerate images
Fixed semi-transparent pixels of apple-touch-icon.png.
I had to manually exclude public/img/loading.png from the commit because
it's an APNG and one of the tools destroys the animation.
* exclude loading.png
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
