Blocklint

Placing a ` blocklint pragma` at the end of a doc string will ignore any blocked words in the entire doc string.

Thanks to pacrob for the idea and coding.

A few minor fixes and updates.

Several improvements:
- Can invoke as a python module
- Support for configuration files
- Fixed support for pre-commit-hook

Fixed a typo that wasn't caught by unit tests.

Improved test coverage to ensure future changes will be more robust.

Restructured project setup and added new workflows for precommit and building.