Move egui layer to a separate DebugGuiStack structure

src/core/time.rs

@@ -0,0 +1,43 @@
+//! Provides time related functionality for Clocks.
+use std::time::{Duration, Instant};
+
+use flax::component;
+
+component! {
+    pub clock: Clock,
+}
+
+/// Measures high precision time
+#[allow(dead_code)]
+pub struct Clock {
+    start: Instant,
+}
+
+#[allow(dead_code)]
+impl Clock {
+    // Creates and starts a new clock
+    pub fn new() -> Self {
+        Clock {
+            start: Instant::now(),
+        }
+    }
+
+    // Returns the elapsed time
+    pub fn elapsed(&self) -> Duration {
+        Instant::now() - self.start
+    }
+
+    // Resets the clock and returns the elapsed time
+    pub fn reset(&mut self) -> Duration {
+        let elapsed = self.elapsed();
+
+        self.start = Instant::now();
+        elapsed
+    }
+}
+
+impl Default for Clock {
+    fn default() -> Self {
+        Self::new()
+    }
+}