Set up Github action to automatically publish VS Code on release

[donfour]

Is your feature request related to a problem? Please describe.
The steps to publish a vs code extension is the same everytime:

1. vsce publish
2. bump version

So it's ideal if we could automate these steps to avoid mistakes.

Describe the solution you'd like
Whenever we create a release on Github, we could set up an action to do the above two steps.

Describe alternatives you've considered
n/a

Additional context
n/a