feat: IW3 xanim dumping/loading in CoD4 Mod Tools raw binary format (#768)

* feat: IW3 dump xanim to cod4 mod tools compatible binary

* chore: add XAnimPartType enum to game headers

* chore: use XAnimPartType in XAnimDumperIW3

* chore: extract xanim filename into XAnimCommon

* chore: prefer emplace_back over push_back

* chore: small code style improvements

* chore: use proper unsigned types for XAnimParts structs

* chore: use better understandable calculations for bitfields

* chore: use game names for parts

* chore: rename method to WriteNoteTracks

* chore: adds comments and improve clearity of what the game does

* chore: extract stream writing methods into StreamUtils

* chore: use vec3 for XAnimPartTransFrames mins and size

* chore: properly differ between XQuat and XQuat2 structs

* chore: use constants for xanim flags

* chore: use optional for delta track quats and trans

* chore: split delta track writing methods into quat and trans

* chore: add assertion for bDelta

* chore: simplify quat frame encoding indexing

* chore: simplify float to int bit casting

* chore: do not throw exception on failing to reconstruct bone tracks

* feat: add xanim loader for iw3

* fix: make sure to sort quats and trans like the game

* chore: prevent empty dumped files on bad xanim data

* chore: ensure no exception on zero frames in xanim notifies

* test: add system test for iw3 xanims

---------

Co-authored-by: Jan Laupetin <jan@laupetin.net>

docs/SupportedAssetTypes.md

@@ -12,7 +12,7 @@ The following section specify which assets are supported to be dumped to disk (u
 | Asset Type           | Dumping Support | Loading Support | Notes                                                                        |
 | -------------------- | --------------- | --------------- | ---------------------------------------------------------------------------- |
 | PhysPreset           | ✅              | ✅              |                                                                              |
-| XAnimParts           | ❌              | ❌              |                                                                              |
+| XAnimParts           | ✅              | ✅              |                                                                              |
 | XModel               | ✅              | ✅              | Model data can be exported to `XMODEL_EXPORT/XMODEL_BIN`, `OBJ`, `GLB/GLTF`. |
 | Material             | ✅              | ✅              |                                                                              |
 | MaterialTechniqueSet | ✅              | ✅              | For shaders: only dumps/loads shader bytecode.                               |