Bloup v1.2.0

Features :
- Add lore introduction
- Add a tutorial
- Add a leaderboard
- Add a retry menu while in game
- Display score and bubble burst timing statistics after a game

Comfort :
- Update bubble spawn times to match better with the music
- Make bubble inflate at a linear speed to make it more predictable to burst 
- Load music at start to avoid freezes on button Play clicked
- Deserialize track only one time at start to avoid freezes on button Play clicked

Bug fixes :
- Fix bubbles cannot be burst too late
- Fix bubble burst impossible in a specific zone
- Fix Bloup jittering movement
- Fix Bloup not at the exact mouse position in screen corners

Visuals :
- Add a green indicator on bubbles at perfect burst timings
- Add synchronized notes coming out of bubbles with different colors and animations based on the burst timing 
- Add menu transitions
- Darken background in menus
- Add in game UI for score, combo and track progression
- Fix bubble spawn position relative to spirits
- Add an icon and rename the executable file

Sound :
- Add a new music for menus