Added touch screen features, calibration and a few more screens

TouchController.h

@@ -0,0 +1,36 @@
+#include <FS.h>
+#include <XPT2046_Touchscreen.h>
+
+#ifndef _TOUCH_CONTROLLERH_
+#define _TOUCH_CONTROLLERH_
+
+typedef void (*CalibrationCallback)(int16_t x, int16_t y);
+
+class TouchController {
+  public:
+    TouchController(XPT2046_Touchscreen *touchScreen);
+    bool loadCalibration();
+    bool saveCalibration();
+    void startCalibration(CalibrationCallback *callback);
+    void continueCalibration();
+    bool isCalibrationFinished();
+    bool isTouched();
+    bool isTouched(int16_t debounceMillis);
+    TS_Point getPoint();
+
+  private:
+    XPT2046_Touchscreen *touchScreen;
+    float dx = 0.0;
+    float dy = 0.0;
+    int ax = 0;
+    int ay = 0;
+    int state = 0;
+    long lastStateChange = 0;
+    long lastTouched = 0;
+    CalibrationCallback *calibrationCallback;
+    TS_Point p1, p2;
+
+};
+
+#endif
+