Add regulation extractor to legislation parser

[strum3nt]

Problem

The current case to legislation parser looks for references to sections of acts. We should also find references to regulations in case law. The same logic from the legislation parser can be applied to look for references to rules of regulations.

Current process

Currently the legislation parser works by pulling a list of all current and repealed legislation from legislation.govt.nz (https://github.com/openlawnz/openlawnz-pipeline/blob/master/ingester/ingester/getDataFile/pcoLegislation.js). It then looks through cases for references to "sections" by looking for particular characters defined in parseLegislationToCases.js https://github.com/openlawnz/openlawnz-pipeline/blob/b69612ee3d417f97752e6bfe03f6a10ac3dde0e9/pdfconverter/pdfconverter/parseLegislation.js#L223
Followed by a number or numbers.

Suggested modifications

• Modify getLegislation to obtain the list of all current and repealed legislation and regulations. Legislation and regulations must be pulled and stored separately (do not mix legislation and regulations in the same table). Make a new regulations table and casesToRegulations table for relations.
• Copy parseLegislationToCases and add another separate parser, or modify the existing parser, to parse regulations as well. Line 223 would need to include (or be changed to):

((word === 'r' || word === 'regulation' || word === 'rr' || word === 'regulations' || word ==='rule' || word='rules') &&