Refactor Spin to MaximumSpinSpeed

Additionally, add descriptions to
other FallsToEarth properties.

mods/cnc/rules/defaults.yaml

@@ -1087,7 +1087,6 @@
 		VTOL: true
 		CanSlide: True
 	FallsToEarth:
-		Spins: True
 		Moves: False
 		Explosion: HeliCrash
 	Tooltip:

mods/d2k/rules/defaults.yaml

@@ -262,7 +262,7 @@
 		GenericName: Unit
 	WithShadow:
 	FallsToEarth:
-		Spins: False
+		MaximumSpinSpeed: 0
 		Moves: True
 		Explosion: UnitExplodeLarge
 	-MapEditorData:

mods/ra/rules/defaults.yaml

@@ -1030,10 +1030,10 @@
 		GenericName: Destroyed Plane
 	Aircraft:
 	FallsToEarth:
-		Spins: False
 		Moves: True
 		Velocity: 86
 		Explosion: UnitExplodePlane
+		MaximumSpinSpeed: 0
 	-MapEditorData:
 	RevealOnDeath:
 		Duration: 60

mods/ts/rules/defaults.yaml

@@ -945,9 +945,9 @@
 	Tooltip:
 		GenericName: Destroyed Aircraft
 	FallsToEarth:
-		Spins: true
 		Moves: true
 		Velocity: 112
+		MaximumSpinSpeed: 10
 	HitShape:
 
 ^Visceroid:

mods/ts/rules/husks.yaml

@@ -30,8 +30,10 @@ ORCAB.Husk:
 	Tooltip:
 		Name: Orca Bomber
 	Aircraft:
-		TurnSpeed: 5
+		TurnSpeed: 3
 		Speed: 96
+	FallsToEarth:
+		MaximumSpinSpeed: 6
 	RenderSprites:
 		Image: orcab
 	RenderVoxels:
@@ -78,8 +80,10 @@ SCRIN.Husk:
 	Tooltip:
 		Name: Banshee Fighter
 	Aircraft:
-		TurnSpeed: 5
+		TurnSpeed: 3
 		Speed: 168
+	FallsToEarth:
+		MaximumSpinSpeed: 6
 	RenderSprites:
 		Image: scrin
 	RenderVoxels: