Fix #22228 adding RSS feeds for branches and files.
RSS feeds are accessed through:
* [gitea]/src/branch/{branch}.rss
* [gitea]/src/branch/{branch}/{file_name}.rss
No changes have been made to the UI to expose the feed urls for branches
and files.
Follow #23394
There were many bad smells in old code. This PR only moves the code into
Vue SFC, doesn't touch the unrelated logic.
update: after
5f23218c85
, there should be no usage of the vue-rumtime-compiler anymore
(hopefully), so I think this PR could close #19851
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Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>