refactored the shit out of our editor to improve gesture smoothness and performance. also added zooming the whole canvas.

challenges
- handling conflicting gestures between elements gracefully
- performance differences between iOS and android esp when bridging between js x ui threads
- managing react state during complex gestures while minimizing rerenders
- gestures come with a certain intuition and expectation from the user for how things should respond. converting this into rules was a fun challenge
- ai had a tough time reasoning about gestures and accounting for edge cases and interaction side effects. maybe cus it doesnt have hands 🤷‍♂️