ksys/phys: Add RigidBody collision filter info functions

Including a bunch of BitFields additions so we can get the desired
codegen without sacrificing readability or flexibility.
(The alternative would be building masks and masking manually.)

getCollisionFilterInfo was changed to return a u32 instead of
EntityCollisionFilterInfo because a collision filter info mask
can be either an EntityCollisionFilterInfo or a ReceiverMask.

(Also at some point we'll probably want to rename
EntityCollisionFilterInfo because that is also used for sensor
rigid bodies and not just for entities.)

src/KingSystem/Physics/System/physInstanceSet.h

@@ -18,6 +18,8 @@ public:
 
 namespace ksys::phys {
 
+class SystemGroupHandler;
+
 class Ragdoll {};
 
 class RagdollController {
@@ -117,7 +119,7 @@ private:
     u8 _e0[0x148 - 0xe0];
     sead::TList<RigidBody*> mList;
     u8 _160[0x188 - 0x160];
-    void* _188[2];
+    SystemGroupHandler* _188[2];
 };
 KSYS_CHECK_SIZE_NX150(InstanceSet, 0x198);