Refactored for teensy 4.0, xEvi hardware

- Switched to platformio, ino -> cpp
- MPRLS for pressure sensor
- Added basic ICM support
- Removed widi, battery, other features not supported in xEvi
- Removed legacy options/processing
- Added LED strip support
- Added encoder support
- Reworked menu code to use encoders/be more flexible

NuEVI/src/menu.h

@@ -0,0 +1,44 @@
+#ifndef __MENU_H
+#define __MENU_H
+
+#include "wiring.h"
+
+#define MENU_ROW_HEIGHT 9
+#define MENU_HEADER_OFFSET 12
+#define MENU_NUM_ROWS 6
+#define ADJUST_NUM_ROWS 3
+#define ADJUST_ROW_HEIGHT 21
+
+extern const unsigned long debounceDelay;           // the debounce time; increase if the output flickers
+extern const unsigned long buttonRepeatInterval;
+extern const unsigned long buttonRepeatDelay;
+extern const unsigned long cursorBlinkInterval;    // the cursor blink toggle interval time
+extern const unsigned long patchViewTimeUp;       // ms until patch view shuts off
+extern const unsigned long menuTimeUp;           // menu shuts off after one minute of button inactivity
+
+struct InputState {
+  bool changed = false;
+  bool btnMenu = false;
+  bool btnVal1 = false;
+  bool btnVal2 = false;
+  bool btnPreset = false;
+  int knobMenu = 0;
+  int knobVal1 = 0;
+  int knobVal2 = 0;
+  int knobPreset = 0;
+};
+
+struct MenuScreen {
+    MenuScreen() {};
+    virtual const char *title() { return ""; };
+    virtual void update(InputState input, bool redraw) {};
+    virtual ~MenuScreen() {};
+};
+extern const MenuScreen adjustMenu;
+
+void initDisplay();
+void showVersion();
+void displayError(const char *error);
+void handleMenu(bool draw);
+
+#endif