Moved primary lcd and navigation into dedicated files

src/navigation/input.rs

@@ -1 +1,15 @@
-// Navigation input module
+use esp_hal::gpio::{Input, InputConfig, Pull};
+use esp_hal::peripherals::GPIO38;
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+pub enum NavCommand {
+    NextCard,
+    PrevCard,
+    Select,
+    ScanTag,
+}
+
+pub fn init_navigation_button(pin: GPIO38<'static>) -> Input<'static> {
+    let button_config = InputConfig::default().with_pull(Pull::Up);
+    Input::new(pin, button_config)
+}