Fix USB MIDI, add LED startup animation, improve logging

- Use ArduinoUSBMIDI library for proper USB MIDI device recognition
- Add LED startup colour cycle (red, green, blue, yellow, magenta, cyan, white)
- Add comprehensive console logging for all MIDI in/out and switch events
- Log unmapped MIDI messages

src/main.cpp

@@ -7,24 +7,20 @@
 #include "switch_stub.h"
 #include "app_task.h"
 
-// Hardware instances
 DefaultLedStub led_driver;
 DefaultSwitchStub switch_driver;
 UsbMidiTransport midi_transport;
 
-// Controller task
 AppTask controller(&led_driver, &switch_driver, &midi_transport);
 
-// FreeRTOS task handles
 TaskHandle_t midi_task_handle = NULL;
 
-// MIDI processing task (runs on core 0)
 void midi_task(void* parameter) {
     Serial.println("[TASK] MIDI task started on core 0");
     
     while (true) {
         midi_transport.update();
-        vTaskDelay(1);  // Yield to other tasks
+        vTaskDelay(1);
     }
 }
 
@@ -32,22 +28,17 @@ void setup() {
     Serial.begin(115200);
     delay(1000);
     
-    Serial.println("=============================");
-    Serial.println("Loopy MIDI Controller v0.1");
-    Serial.println("Phase 1: USB MIDI");
-    Serial.println("=============================");
+    Serial.println("=================================");
+    Serial.println("  Loopy MIDI Controller v0.1");
+    Serial.println("  Phase 1: USB MIDI");
+    Serial.println("=================================");
     
-    // Initialize hardware stubs
     led_driver.begin();
     switch_driver.begin();
     
-    // Initialize MIDI transport
     midi_transport.begin();
-    
-    // Initialize controller
     controller.begin();
     
-    // Create MIDI task on core 0 (high priority)
     xTaskCreatePinnedToCore(
         midi_task,
         "midi_task",
@@ -58,12 +49,13 @@ void setup() {
         0
     );
     
-    Serial.println("[INIT] All systems ready");
-    Serial.println("=============================");
+    Serial.println("=================================");
+    Serial.println("  All systems ready");
+    Serial.println("  Waiting for USB connection...");
+    Serial.println("=================================");
 }
 
 void loop() {
-    // Controller task runs on core 1 (main Arduino loop)
     controller.update();
-    delay(10);  // 10ms loop period
+    delay(10);
 }