This update includes a number of small changes and improvements, with a focus on introducing a
new Unity package containing ready-to-use assets and a scene example.

Changelog:

1) Updated Key Icon:

- Redesigned Key Icon
- Added Key Empty state variation 

2) Added Diamond 3 color variations:

- Blue
- Green
- Purple 

3) Redesigned Heart Icon

4) Resized A few icons to match overall visual consistency

5) Added Coins IAP UI Segment

6) Removed Grey icons variations

7) Reorganized various directories and files names

8)  Added Unity Package