v0.2.1 Long-Lived Branch

[kheina]

This is a long-lived branch, intended to aggregate all changes planned for version 0.2.1.

Pull requests should be made against this branch

[kheina]

I'm sort of winging it with this llb branch currently since this will be my first time doing this kind of versioning.

procedure moving forward for deploying will be:

1. merge all pull requests to llb
2. ensure manifests have the correct version/platform info (manifest.json points to chrome, firefox-manifest.json points to firefox)
3. use makefile to generate zips (make chrome, make firefox)
   • test chrome locally using zip
   • test firefox locally using zip
4. merge llb to main
5. upload zips from 3 to chrome webstore and firefox addons