Java 21, bugfix

Fixed a bug which caused white stripes to appear sometimes
Dropped Graal build since it worked like crap anyway

Brightness, contrast, autonaming

• Sliders for brightness, contrast and saturation
• Autonaming on ctrl+s
• Something else, probably

File tree view, text scaling

Somewhat speeds up creation process

Somewhat working version, very cool

Jar requires JVM with JavaFX native libraries, e.g. Liberica or any other with manual fiddling. There's also AOT-compiled native image for Linux