Reorganization of library structure to better match Arduino spec (#20)

Note, this will also require to you "uninstall and reinstall" the Arduino library due to the library file location changes.

Reviewed-on: https://git.pinkduck.xyz/awonak/libGravity/pulls/20

src/libGravity.h

@@ -0,0 +1,62 @@
+/**
+ * @file libGravity.h
+ * @author Adam Wonak (https://github.com/awonak)
+ * @brief Library for building custom scripts for the Sitka Instruments Gravity module.
+ * @version 0.1
+ * @date 2025-04-19
+ * 
+ * @copyright MIT - (c) 2025 - Adam Wonak - adam.wonak@gmail.com
+ *
+ */
+
+#ifndef GRAVITY_H
+#define GRAVITY_H
+
+#include <Arduino.h>
+#include <U8g2lib.h>
+
+#include "analog_input.h"
+#include "button.h"
+#include "clock.h"
+#include "digital_output.h"
+#include "encoder.h"
+#include "peripherials.h"
+
+// Hardware abstraction wrapper for the Gravity module.
+class Gravity {
+   public:
+    static const uint8_t OUTPUT_COUNT = 6;
+
+    // Constructor
+    Gravity()
+        : display(U8G2_R2, SCL, SDA, U8X8_PIN_NONE) {}
+
+    // Deconstructor
+    ~Gravity() {}
+
+    // Initializes the Arduino, and Gravity hardware.
+    void Init();
+
+    // Polling check for state change of inputs and outputs.
+    void Process();
+
+    U8G2_SSD1306_128X64_NONAME_1_HW_I2C display;  // OLED display object.
+    Clock clock;                                  // Clock source wrapper.
+    DigitalOutput outputs[OUTPUT_COUNT];          // An array containing each Output object.
+    DigitalOutput pulse;                          // MIDI Expander module pulse output.
+    Encoder encoder;                              // Rotary encoder with button instance
+    Button shift_button;
+    Button play_button;
+    AnalogInput cv1;
+    AnalogInput cv2;
+
+   private:
+    void initClock();
+    void initDisplay();
+    void initInputs();
+    void initOutputs();
+};
+
+extern Gravity gravity;
+
+#endif