Add Feed for Releases and Tags (#21696)

Fixes #19091

Add Feed for Releases and Tags, can be accessed through
`reponame/releases.rss`, `reponame/releases.atom`, `reponame/tags.rss`,
and `reponame/tags.atom`

Signed-off-by: Reo <reo_999@proton.me>

options/locale/locale_en-US.ini

@@ -2279,6 +2279,8 @@ release.downloads = Downloads
 release.download_count = Downloads: %s
 release.add_tag_msg = Use the title and content of release as tag message.
 release.add_tag = Create Tag Only
+release.releases_for = Releases for %s
+release.tags_for = Tags for %s
 
 branch.name = Branch Name
 branch.search = Search branches