Timing Module Update

- Implement a new timing module
- Utilize the new timing module in glium platform implementation for frame limiting and fixed engine updates timing.

platform/src/context.rs

@@ -7,4 +7,12 @@ pub struct PlatformContext {
     pub asset_manager: ModelManagerRef,
     pub frame_width: f32,
     pub frame_height: f32,
+    pub time_ctx: TimeContext,
+}
+
+#[derive(Clone)]
+pub struct TimeContext {
+    pub frame_dt: f32,
+    pub fixed_dt: f32,
+    pub alpha: f32,
 }

platform/src/lib.rs

@@ -5,4 +5,4 @@ pub mod context;
 
 pub use platform::Platform;
 pub use camera::Camera;
-pub use context::PlatformContext;
+pub use context::{PlatformContext, TimeContext};