Changed function signatures to remove const qualifiers

Changed several function signatures across multiple files to remove the `const` qualifier from parameters of type `vec3s` for improved flexibility.
Changed `material_collection_create` to `material_collection_init` for better initialization handling.
Changed `scene_create` to `scene_init` to return a boolean indicating success or failure.
Changed `render_target_create` to `render_target_init` for consistent initialization practices.
Changed `window_create` to remove `const` from its parameters for consistency.
Changed `evaluate_bsdf_directional` and `evaluate_bsdf_const_sky` to remove `const` from their parameters.
Changed `sample_bsdf_simple_lit` and `sample_bsdf_pdf_simple_lit` to remove `const` from the `normal` parameter.
Changed `scene_render` to take a pointer to `render_target_t` instead of returning it directly.
Updated `main.c` to reflect new initialization functions for better memory management.

header/Algorithm/PathTracing.h

@@ -6,6 +6,6 @@
 #include "Geometry/Triangle.h"
 #include "Rendering/Scene.h"
 
-vec3s path_trace(const scene_t* scene, const ray_t ray, const uint32_t sample_index, const int depth);
+vec3s path_trace(const scene_t* scene,  ray_t ray,  uint32_t sample_index,  int depth);
 
 #endif // PATH_TRACING_H