big day for the VSCode TidalCycles extension!

It took some work, but the extension now benefits from automated semantic versioning and releases to both github and the VSCode marketplace.

This is great because now a robot is in charge of all this, instead of the process all being in my head.

This also will expedite fixes and features to users.

Over the past month I've also overhauled the extension to be easier to maintain, added tests, and removed extra features that didn't seem to fit with the extension's intended scope.