feat: Enhance model and texture loading with improved error handling and new features

- Introduced `LoadedModel` and `LoadedTexture` structs for better encapsulation of model and texture data.
- Added functions to load models and textures from archives, including support for resolving textures based on materials and wear entries.
- Implemented error handling for missing textures, materials, and wear entries.
- Updated the rendering pipeline to support texture loading and binding, including command-line arguments for texture customization.
- Enhanced the `texm` crate with new decoding capabilities for various pixel formats, including indexed textures.
- Added tests for texture decoding and loading to ensure reliability and correctness.
- Updated documentation to reflect changes in the material and texture resolution process.

crates/render-demo/Cargo.toml

@@ -11,6 +11,7 @@ demo = ["dep:sdl2", "dep:glow", "dep:image"]
 msh-core = { path = "../msh-core" }
 nres = { path = "../nres" }
 render-core = { path = "../render-core" }
+texm = { path = "../texm" }
 sdl2 = { version = "0.37", optional = true, default-features = false, features = ["bundled", "static-link"] }
 glow = { version = "0.16", optional = true }
 image = { version = "0.25", optional = true, default-features = false, features = ["png"] }