Fighter mechanics

[rukai]

Advanced custom fighter mechanics will be enabled by scripting when that is added. https://github.com/rukai/PF_Sandbox/issues/10

However, coexisting with scripting, there will be a bunch of cookie cutter mechanics available. Each fighter can toggle these on/off and there is some level of customization for them.

Player mechanics that are currently missing:

• [x] Power shield // Can still be enabled while regular shield is disabled
• [x] Shielding mechanics
  • [x] Shield
  • [x] Analog shields
  • [x] Shield aiming
• [x] Knockdown
  • [x] Knockdown state
  • [x] Getup states
• [x] Tech
• [ ] Spot-dodge
• [ ] Roll
• [ ] Grabs
  • [ ] Throws
  • [ ] Pummels
• [ ] Wall jump
• [x] L-cancelling
• [x] Improve current mechanics (physics and state transitions)