Release: Publish Gitea 1.23.0-rc0

[lunny]

1.23.0-rc0

Close #30261

• Check all main languages' translations are almost completed
• Tag v1.24.0-dev on the main branch
• Create a new branch release/v1.23
• Release 1.23.0-rc0 from release/v1.23 branch
  • Generate 1.23.0-rc0 release note
  • Tag 1.23.0-rc0 with git tag -s -f changelog_1.23.0-rc0.md v1.23.0-rc0 and Push to Github
  • Wait for the release created and check whether the release artifacts generated
    • Check whether Github release attachments are generated and normal
    • Check whether the binaries generated under https://dl.gitea.com/gitea/1.23.0-rc0/ and normal
    • Check whether docker images are generated https://hub.docker.com/r/gitea/gitea/tags?page=&page_size=&ordering=&name=1.23.0-rc0
  • If the release does work then make it out of draft so that it's public for everyone.
• Add 1.23.0-rc0 version in documentation
• Blog for 1.23.0-rc0
• Announce the 1.23.0-rc0 release.