Expand regex filters to exclude actions from output

[mfebrizio]

The goal is to develop and add new filters to the tool so that it removes additional common FR actions from the output.

The relevant code is under the regdigest/ directory. The regular expression (regex) filters are in the file, regex_filters.py. Here's how I'd suggest approaching new filters:

• Use the tool to retrieve output for a whole year of documents (likely 2023)
• Work through the output and identify actions that are highly similar, non-substantive, and/or minor that would not make it into a Reg Digest issue
• Develop regex filters that would capture those actions
• Test the program in a branch to see whether it works to remove those actions from the output

Here are some resources on regex:

• website for testing regex: https://regex101.com/
• Python regex tutorial: https://docs.python.org/3/howto/regex.html

[mfebrizio]

Implemented here: #19