Free Spirited

In this update, I implemented the classic wall slide and wall jump! BUT! they are overhauled!

Wall slide:

• now triggers ONLY when you actively walk TOWARDS the wall!
• holding jump while walking against a wall on the ground makes you climb up (to approximately 4 blocks) just like the standard engine of Ori
• easier to move away, and the wall slide now properly cancels!
• refreshes air jumps!

Wall jump:

• holding jump will make you jump HIGHER!
• not moving or moving against the wall pushes you away from the wall during the jump
• wall pushes apply ONLY when jump is held!
• minor tweaks

"This is the most I, Neiru Sharpleaf, can teach for now! Catch ya later, spirit!"