Introduce iced_sentinel and iced_debug crates

sentinel/src/timing.rs

@@ -0,0 +1,25 @@
+use crate::core::time::Duration;
+
+use serde::{Deserialize, Serialize};
+
+#[derive(
+    Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize,
+)]
+pub struct Timing {
+    pub stage: Stage,
+    pub duration: Duration,
+}
+
+#[derive(
+    Debug, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Serialize, Deserialize,
+)]
+pub enum Stage {
+    Boot,
+    Update,
+    View,
+    Layout,
+    Interact,
+    Draw,
+    Render,
+    Custom(String),
+}