Move crates to dedicated crates folder

[Rigidity]

There is no convention that I can find per se that says that workspaces should be organized like this, with a crates folder rather than putting all of the crates in the root. The closest thing I could find is this blog post by the creator of Rust Analyzer.

However, I think that this is the beginning of a list of changes I want to make:

1. Move all of the crates into a dedicated crates folder to reduce clutter in the repository's root.
2. Move the src folder and its actual dependencies into a new crate named chia-consensus.
3. Turn chia into a meta-crate that re-exports each of the workspace's crates as togglable features that are enabled by default.
4. Ideally, find a cleaner way to store test data than the ff-tests, cl, test-bundles, and generator-tests folders.
5. Move the docs into actual documentation in the root of the appropriate crate.
6. Add an examples folder, with examples for each thing you may want to do with chia_rs in Rust (maybe chia-tools should live there?).
7. Improve test coverage.

[coveralls-official]

Pull Request Test Coverage Report for Build 8141003193

Details

• 1 of 1 (100.0%) changed or added relevant line in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 85.2%

---

Totals
Change from base Build 8115930322:	0.0%
Covered Lines:	11439
Relevant Lines:	13426

---

💛 - Coveralls

[arvidn]

looks good in general. I'm not sure the globbing is a good idea though