Discord rich presence and lots of fixes!

Content and Additions:

• Added rich presence for Discord! People can now see where you are, and who you're playing as.

Aesthetic Changes and Improvements:

• Chests have been resprited so that future chests are more consistent.
• Fixed some odd pixels on Pill Bottle's sprite.

Balance Changes and Tweaks:

• Characters now have different max HP values instead of defense. Wyatt has 125, Trench has 75, everyone else has 100.
• Everyone except Xandra now only has 3 inventory slots.
• Removed Xandra's mapping ability.

Addressed Issues and Bug Fixes:

• Fixed being able to walk outside the borders of the map.
• Made the top and bottom border the same distance from spawn.
• Fixed Robot Vacuum not persisting through floors.
• Fixed positioning issues with Smoke Mole.
• Fixed Bob's Strong Self causing issues with guns that use more than 1 ammo.
• Removed the /help from the console as it was outdated.
• Fixed the /keys command in the console to work with the inventory system.
• Fixed a bug where there was no menu music and instead it was a clip of me saying "woah mama" endlessly.