Fire rework & perch room preview update

[h2]Changes[/h2]
[h3]🌟 New:[/h3]
- Fire rework: changed the way fire spreads and damages ships.⚡
- Perch room preview: to celebrate the PixElated Fest, a preview version of the new Perch room is already available in this demo! Build mechanical birds to destroy enemy ships!

[h3]⚖ Balance:[/h3]
- Increased supply stock in zones 5 and beyond.

[h3]🎆 Graphic:[/h3]
- Improved positioning of large enemy ships.

[h3]🐞 Bugfix:[/h3]
- Maybe fixed a bug that prevented the game from quitting correctly.

[h3]💻 UI:[/h3]
- Add an fire icon on the hull bar when your ship is on fire
- “Auto-pause on fire” option now triggers only for the first fire ⚡
- Added F1 / F2 / F3 keyboard shortcuts for setting game speed to 1x / 2x / 4x
- Improved text legibility for items with long names in shop (like “Medium automaton center level 2”)

⚡ change inspired by the community & content creators


[h2]Fire rework[/h2]
Before this update, fire was an all-or-nothing strategy: small amounts of fire were almost useless, and large amounts became impossible to counter. This update makes several changes to the way fire works to improve the balance.

- Now, each fire slowly produces damage to the ship's hull and possibly to the room in which it is located, depending on its power.
- Propagation has also been modified: each fire gradually gains in power. When it reaches a certain power, it spreads the fire to a surrounding tile.
- Conversely, fighting a fire will gradually reduce its power.