Fix problem saving template

Fixes:
- Fix fall damage when falling off the world
- Fix world limit
- Fix PvP
- Fix entity damage
- Fix auto-complete

✨ Additions:
- Add template edit system
- Add language support system
- Add command /pw template edit
- Add command /pw template save
- Add command /pw template setspawn
- Add permission gprivateworlds.template.edit

Add command /pw leave
Add command /pw delete

Internal bugs have been fixed.