Documentation fixes (#96)
- Added a "SQL Compliance" page (that is not yet complete) but it enough
to get the ball rolling on fleshing out exactly which features are
missing before we can claim a v1.0.0
- Updated the README to be a lot more helpful with quick links.
- Fixed some formatting that was previously breaking the build.
- Added a "Transactions" and "Installing & Updating" documentation
pages.
- Added the readthedocs.yaml configuration file which is the recommended
way and also cleaned up the existing conf files and pinned the python
dependencies (as recommended).
