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/test.cpp

@@ -0,0 +1,57 @@
+#include "hardware.h"
+
+uint8_t oldButtons = 0;
+uint16_t oldKeys = 0;
+uint16_t oldUtil = 0;
+bool plotCap = false; 
+
+void handleTestMode() {
+    uint8_t buttons = buttonState();
+    if (buttons != oldButtons) {
+        oldButtons = buttons;
+        Serial.print("Buttons:");
+        Serial.println(buttons, HEX);
+    }
+
+    for (int i = 0; i < 4; i++) {
+        int k = readKnob(i);
+        if (k != 0) {
+            Serial.print("Knob");
+            Serial.print(i);
+            Serial.print(":");
+            Serial.println(k);
+        }
+    }
+
+    uint16_t keys = keysTouched();
+    if (keys != oldKeys) {
+        Serial.print("Keys:");
+        Serial.println(keys, HEX);
+    }
+
+    uint16_t util = utilTouched();
+    if (util != oldUtil) {
+        Serial.print("Util:");
+        Serial.println(util, HEX);
+    }
+
+    if (buttons == 0x01) { 
+        plotCap = !plotCap;
+    }
+
+    if (plotCap) {
+        for (int i = 0; i < 12; i++) {
+            Serial.print(">key");
+            Serial.print(i);
+            Serial.print(":");
+            Serial.println(readTouchKey(i));
+        }
+
+        for (int i = 0; i < 12; i++) {
+            Serial.print(">util");
+            Serial.print(i);
+            Serial.print(":");
+            Serial.println(readTouchUtil(i));
+        }
+    }
+}