gitea/modules/httplib
wxiaoguang b71cb7acdc
Use fetch to send requests to create issues/comments ()
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Network error won't make content lost. And this is a much better
approach than "loading-button".

The UI is not perfect and there are still some TODOs, they can be done
in following PRs, not a must in this PR's scope.

<details>


![image](https://github.com/go-gitea/gitea/assets/2114189/c94ba958-aa46-4747-8ddf-6584deeed25c)

</details>
..
request.go Make repository response support HTTP range request ()
serve.go Make repository response support HTTP range request ()
serve_test.go Use standard HTTP library to serve files ()
url.go Use fetch to send requests to create issues/comments ()
url_test.go Use fetch to send requests to create issues/comments ()