144: Adds compute-boids example from gpuweb demos r=kvark a=masonblier Port of the computeBoids.ts demo from https://github.com/austinEng/webgpu-samples/blob/master/src/examples/computeBoids.ts using separate compute and render passes with shared buffers bound by layout location.  I'm happy to receive any feedback related to these changes and if there's any interest in merging it to the main repository. Thanks, Mason Co-authored-by: Mason <mason.blier@gmail.com>