Better enemy death animations & blood decal

[Mooses2k]

easy mode: ragdoll (DONE)

sometimes:

• enemies should sometimes drop weapon and grab place they were fatally wounded
• sometimes make last attempt to attack as they fall
• Hellish Quart has best death animations

https://docs.godotengine.org/en/stable/tutorials/physics/ragdoll_system.html

https://www.youtube.com/watch?v=S_ZTAfM93XU

Nov 21 - The legs should be reasonably configured, maybe a bit too loose the arms are very t-posey now but it should be simple to change the shoulder joints to improve it biggest issue is that, when you set the angle limits, the joints are basically completely loose within the limits some games improve that by applying dynamic forces on each joint, to simulate the natural resistance for example, you could have something like a downed pose, maybe just fetal position and apply forces on the joints to make them go towards that pose you can see something like that in GTA, when falling down a cliff or something

Related to #533

BLOOD DECAL

add slowly growing blood decal when enemy dies and hits ground and when blood particle hits surface https://godotshaders.com/shader/bloody-pool-smooth-blood-trail/ and https://github.com/Master-J/DecalCo with https://www.freevector.com/blood-splatters and https://www.freevector.com/splattered-blood-graphics-set and https://www.freevector.com/splattered-blood-set and https://www.freevector.com/blood-stains-graphics and https://www.freevector.com/splattered-blood-graphics

SO, AT LEAST THESE NEEDED:

• apply weapon impulse to ragdoll
• should freeze and stop moving like high friction or something - want to allow for falling down stairs, but when it's mostly not moving it should totally stop moving so it's not slithering slowly on the floor
• Should be grabbable by holding interact key
• Blood decal thing
• melee hit effect (blood or sparks or wood chips, sounds, etc)

[Mooses2k]

good enough for demo