Started a heuristic marker inference tool

[JustusAdam]

What Changed?

This adds a new tool to the arsenal that uses naming heuristics to assign the kinds of markers that our collated policies use.

This is intended to set up the basic infrastructure for a marker assigner consisting of a recursive directory traversal, parsing using syn and a few sketch heuristics to begin with. It is intended that the heuristics later expand with more patterns we find in the projects we analyze.

Why Does It Need To?

This should make it easier to add markers to new applications for analysis with Paralegal.
The idea is that instead of starting marking for every application form scratch we can instead apply the same rules we used in previous applications to add as many markers as possible automatically.

Checklist

• Above description has been filled out so that upon quash merge we have a
  good record of what changed.
• New functions, methods, types are documented. Old documentation is updated
  if necessary
• Documentation in Notion has been updated
• Tests for new behaviors are provided
  • New test suites (if any) ave been added to the CI tests (in
    .github/workflows/rust.yml) either as compiler test or integration test.
    Or justification for their omission from CI has been provided in this PR
    description.