* Add a cargo deny workflow
Also trims out a pointless submodule checkout (we have none).
* Remove no longer relevant advisories/allowances
* Patch for array-bytes
* Remove unused properties
* Restore chrono advisory
* Allow MPL-2.0, correct GPL-3.0 allowance specification
* Properly ban copyleft, run on all crates
* Exceptions for Serai crates (AGPL-3.0)
* Remove top comments
* Clarify reasoning for not checking advisories in CI
* Run all checks in CI
While this may bring down an unrelated commit, we can manually review, before creating a followup commit allowing it. If it's critical, then this did its job.
