Game of Life with Compose Desktop

Implement Conway's Game-of-Life with Jetpack Compose Desktop

• Each cell is a State<Boolean>
• Cells in root(0) geneneration are mutableState
• Cells in child(1 and later) genenerations are derivedState of prev gen

Inspired by https://dev.to/zachklipp/scoped-recomposition-jetpack-compose-what-happens-when-state-changes-l78

The reason I chose Compose Desktop

• I never used Compose so I wanted to try
• To click each cell, desktop is better than mobile.

Performance note

• Each generation looks Row x Column but actually LazyVerticalGrid to limit the composition scope to each cell.
• When I marked only one cell in Gen0, it dies in Gen1, so I expected derivedState doesn't calculate in Gen2 and later, but it actually does calculate for all Gen. why?