feat: Refactor policy engine to support installation as npm package

[john-fletcher-aot]

Description

Refactor so package can be eventually published to npm / artifactory and installed by fe and be. Ease of use improvements as well. Included some notes on usage, preliminary.

Fixes # ORV2-2516 (partial)

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

How Has This Been Tested?

• Jest unit tests confirmed passing

Checklist

• I have read the CONTRIBUTING doc
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have already been accepted and merged

---

Thanks for the PR!

Deployments, as required, will be available below:

• Frontend
• Vehicles
• Dops
• Scheduler

Please create PRs in draft mode. Mark as ready to enable:

• Analysis Workflow

After merge, new images are promoted to:

• Merge Workflow

[sonarcloud]

Quality Gate passed for 'onroutebc vehicles'

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud