chore(ci): Add licence checker workflow

[dpogue]

Platforms affected

all

Motivation and Context

We want to ensure licence compliance at PR time.

Description

• Add the licence checking action workflow
• Fix the dependabot workaround to actually work

Testing

Ran in CI

Checklist

• I've run the tests to see all new and existing tests pass

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 83.65%. Comparing base (08a210d) to head (3a7f553).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #286   +/-   ##
=======================================
  Coverage   83.65%   83.65%           
=======================================
  Files          14       14           
  Lines         520      520           
=======================================
  Hits          435      435           
  Misses         85       85           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

---

🚨 Try these New Features:

• Flaky Tests Detection - Detect and resolve failed and flaky tests
• JS Bundle Analysis - Avoid shipping oversized bundles

[erisu]

LGTM