Healing

• 1.21.3 update (like 3 days before 1.21.4)
• max health is now rounded to a multiple of 0.001 instead of to an integer after healing

• Rewrote everything from the ground up
• Improved asynchronous player healing functionality (player max healths will no longer be jumbled if healed simulaneously or in quick succession)
• Cleaner, more organized, and better commented code with much less bruteforcing/hardcoding
• Higher precision when setting health values
• Less ticking commands
• Player max health values now have no upper bound (however they will be floored if they are not integral)
• Substituted scoreboard input for a heal:api/heal function with two arguments: target and amount

• Internal scoreboards are now declared to be internal in their names
• Max health values apart from 20 now work up to 100.

• Fixed instant health for player healing being one level too high to do anything

Added everything