Prepare 0.2.0.1 release.

[brianjosephmckeon]

Removed other subprojects.
Reformatted.
Use new .github workflows.
Updated changelog.

[brianjosephmckeon]

@andrewthad Got some weird stuff going on with some of the projects.

If you look at the most recent workflow run for this PR, you'll see that certain modules aren't being exposed by siphon and colonnade.

I already moved siphon into its own repo. I was able to build the code, but VSC reported some errors that I ignored because I thought it was just VSC being weird. But now I'm wondering if it was actually trying to tell me something useful.

I also have an open PR for the colonnade repo. Feel free to make any changes you need to in that PR.

You may also notice warnings in these projects related to unused functions, etc. I left them in there because they weren't hurting anything. But since you'll be looking at these projects anyway, it might be good to remove anything that isn't being used.