[1.21+] Reconnect Mod: Reloaded 1.2-1.21.x

This new release adds proper support for 1.21.5 while maintaining backport compatibility with the rest of 1.21 versions. This currently supports Fabric for the time being, more details below known issues.

This new release now also allows players to reconnect via in-game chat!

Known issues:

• Latest Quilt modloader is currently on 0.29.0-beta.5 support (0.16.13 Fabric equivalent), meaning it's not yet accessible. Please create an issue on GitHub to temporarily add Quilt support for 0.29.0-beta.5.
• Quilt support for this version will automatically be implemented once a new modloader version is released (possibly 0.30.0).

What's Changed

• Implement "/reconnect" command by @59xa in #4

Full Changelog: 1.21.1-fabric-&-quilt...1.21.x