feat: conway's game of life mode

[mertovun]

Upon discovering this project, the idea of implementing a Game of Life mode felt very natural. I was pleased to see that the original maintainer once shared this intention, as evidenced by an inactive branch named "life."

What's Added

• Conway's Game of Life mode "life"
• Three update rate modes: whole/half and quarter notes
• UI panel and URL sharing updates for the new app states

You can see a working example here.

Looking Forward

I'm open to making further updates based on feedback. Feel free to reach out with any suggestions for improvement. Thanks for checking out these updates!