Add workflow for checking line width

Add lint workflow for ensuring ~~max~~ line width is same for all files to run on PR. Currently lines 120 or less are accepted. This pr will likely lead to large diffs to get this check to pass, these lint fixes should be addressed in many prs referencing this issue with smaller scope and not whole codebase at once pls.

Start by locating the repository's existing PR lint workflows and any line-width configuration, then confirm how the 120-character limit should apply to all files. Done means a workflow checks line width on pull requests without bundling whole-codebase fixes; address those fixes in smaller follow-up pull requests as requested.

Written by the indexing model from the issue text.