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

firmware/Gravity/Gravity.ino

@@ -2,7 +2,7 @@
  * @file Gravity.ino
  * @author Adam Wonak (https://github.com/awonak/)
  * @brief Alt firmware version of Gravity by Sitka Instruments.
- * @version v2.0.1 - June 2025 awonak - Full rewrite
+ * @version v2.0.0 - June 2025 awonak - Full rewrite
  * @version v1.0 - August 2023 Oleksiy H - Initial release
  * @date 2025-07-04
  *
@@ -46,7 +46,7 @@
  *
  */
 
-#include <gravity.h>
+#include <libGravity.h>
 
 #include "app_state.h"
 #include "channel.h"

firmware/Gravity/app_state.h

@@ -12,7 +12,7 @@
 #ifndef APP_STATE_H
 #define APP_STATE_H
 
-#include <gravity.h>
+#include <libGravity.h>
 
 #include "channel.h"
 

firmware/Gravity/channel.h

@@ -13,7 +13,7 @@
 #define CHANNEL_H
 
 #include <Arduino.h>
-#include <gravity.h>
+#include <libGravity.h>
 
 #include "euclidean.h"
 

firmware/Gravity/save_state.cpp

@@ -17,7 +17,7 @@
 
 // Define the constants for the current firmware.
 const char StateManager::SKETCH_NAME[] = "ALT GRAVITY";
-const char StateManager::SEMANTIC_VERSION[] = "V2.0.0BETA2";
+const char StateManager::SEMANTIC_VERSION[] = "V2.0.0BETA2";  // NOTE: This should match the version in the library.properties file.
 
 // Number of available save slots.
 const byte StateManager::MAX_SAVE_SLOTS = 10;

firmware/Gravity/save_state.h

@@ -13,7 +13,7 @@
 #define SAVE_STATE_H
 
 #include <Arduino.h>
-#include <gravity.h>
+#include <libGravity.h>
 
 // Forward-declare AppState to avoid circular dependencies.
 struct AppState;