cargo: clean up dependencies and improve build times

src/tasks/mod.rs

@@ -2,14 +2,20 @@
 pub mod mpu;
 #[cfg(feature="gps")]
 pub mod gps;
-pub mod render;
-pub mod motion;
-pub mod ui;
 #[cfg(feature="radio")]
 pub mod wifi;
 #[cfg(feature="simulation")]
 pub mod simulation;
-pub mod predict;
+#[cfg(feature="demo")]
 pub mod demo;
+#[cfg(feature="oled")]
+pub mod oled;
+
+// Prediction engines
+pub mod predict;
+pub mod motion;
+
+// Graphics stack
+pub mod ui;
 pub mod safetyui;
-pub mod oled;
+pub mod render;