Timer for Speedrun

• Added support for multiple versions for one pack
• The timer now ends after entering the end portal

• There will now be no warning about the wrong version. (1.20.2+)

• Support Neoforge 1.21
• Minor changes in files

• Some files have been changed
• Support 1.21

Added description of the commands to the description of the mod

Changed some files and added support for Forge, Quilt and NeoForge