Replace contexts with resources

- Implements a new macro to generate code for a new structure: TypeMap
- TypeMaps are wrappers for HashMaps that use TypeIDs as keys.
- Refactor the entire codebase to use the new resource structures.
- This commit is the first step towards getting rid of "god context objects everywhere".

glium_platform/src/system.rs

@@ -6,7 +6,7 @@ use indexmap::IndexMap;
 use glium::{Display, Frame};
 use glium::glutin::surface::WindowSurface;
 use raidillon_assets::ModelManagerRef;
-use raidillon_core::DebugUIBuffer;
+use raidillon_core::{define_typemap, DebugUIBuffer};
 use raidillon_core::scene::Scene;
 use glam::Vec3;
 
@@ -15,7 +15,7 @@ pub struct RenderingContext<'a> {
     pub target: &'a mut Frame,
     pub window: Arc<Mutex<glium::winit::window::Window>>,
     pub asset_manager: ModelManagerRef,
-    pub debug_ui_buffer: Rc<RefCell<DebugUIBuffer>>,
+    pub debug_ui_buffer: &'a DebugUIBuffer,
     pub env_light_dir: Vec3,
 }
 
@@ -35,6 +35,8 @@ pub trait RenderingSystem {
         Self: Sized;
 }
 
+// define_typemap!(RenderingSystemManager, RenderingSystem);
+
 pub struct RenderingSystemManager {
     pub systems: IndexMap<TypeId, Box<dyn RenderingSystem>>,
 }