Improving jump functionality

[FailSpy]

• FEATURE: New crouch jumping toggle on the Player script (6d28627)
• FEATURE/BUGFIX: Jump now has a cooldown timer, allowing you to still "hold" jump to jump over and over again without needing to re-press, but it won't spam it in such a way that will cause you to burn your stamina or other similar effects. The timer is currently set to half a second (27c8843)
• FEATURE/BUGFIX: When jumping off a moving platform (i.e. is recognized by 'get_platform_velocity()'), the jump will inherit the upwards velocity of the platform as well.(27c8843)
• BUGFIX: Jump no longer 'locks' the player unless they successfully perform a jump (6b4bc96)
• BUGFIX: Crouch jumping now works (6d28627)

Issue resolutions:
Fixes #68: Now when you jump off the moving platform, you inherit its upwards velocity. Additionally, jumping doesn't get spammed anymore.
Fixes #59: You can now disable crouch jumping, and by changing the collider on a crouch jump, crouch jumping now works. I haven't refined it any more than that.

[Phazorknight]

Amazing work! Just merged it into main.
Small note: When you hold jump the player jumps repeatedly until stamina runs out. I don't mind this behaviour though. 👍🏼

[FailSpy]

Yep, I'm aware. Given that the code was using "is_pressed" I assumed that holding = jump at every opportunity as desired behavior.

Easy enough to switch to a different behaviour by using "is_just_pressed", though probably at that point want to implement a jump buffer