Chore: Tidy up repo

This is just a small thing, but I think it would be useful to remove some folders for plugin ideas that have either been replaced, or have never gone anywhere. This would be cleaner, and reduce potential confusion. I'm thinking about:

1. cd.FormattedDateTime -- it has a single command which isn't working for me. dwertheimer.DateAutomations has a "/formatted" command which looks to be a maintained equivalent.
2. nmn.DataQuery (latest source code change 2022-12-20) -- the idea is still sound, and is now somewhat possible since 3.17 with folder views and advanced search
3. nmn.sweep (latest change 2023-08-13, and we only have the script.js file)
4. nmn.Templates (latest change 2022-07-02, and we only have the script.js file)
5. np.WeatherLookup (by @dwertheimer; latest source change 2022-12-20) and appears not to be published. We have newer features that seem to cover this.

Thoughts, particularly from @nmn and @mikeerickson?