Change build and deployment process to Github Actions

[doubleplusc]

Currently, dist is included with the repository and used for deployment. To update code, parcel must be manually run to build all the compressed files. It's annoying, easy to forget, and not great for community contributors who don't want to deal with the toolchain.

Switching to Github Actions can automate the bundling process remotely taking the burden off developers. The repo will also no longer need a dist folder, which will be automatically created in Github results and be deployed.

There is also a lot of opportunity to insert sanity tests like all images being available, syntax errors, etc.