Add adv currency formatting

[Draal]

Checklist

• I have read the contribution guidelines.
• make test passes.
• make lint passes.
• New and changed code is covered by tests.
• Performance improvements include benchmarks.
• Changes match the documented (not just the implemented) behavior of Shopify.

[osteele]

Thank you for your interest in contributing to this project!

However, I'm unable to merge this PR as it appears to be a fork divergence rather than a focused contribution. Here are the main concerns:

Issues

1. Fork-specific changes: This PR changes all repository URLs from osteele/liquid to autopilot3/liquid across 64 files. These URL changes would break all links in the documentation and point users to a different repository.

2. Out of scope: This project's goal is compatibility with Shopify Liquid. The PR adds many custom filters and features that are not part of Shopify Liquid:

   • Custom cryptographic filters (md5, sha1, sha256, hmac variants)
   • Proprietary phone number formatting filters
   • CRM-specific functionality (activity IDs, display types, custom tags)
   • Custom set operations (setContains, setContainsAll)

   These belong in application code as extensions (see osteele/gojekyll for an example), or in a fork, not in this library.

3. Massive scope: With 2,522 additions across 64 files and 90+ commits, this mixes too many unrelated changes to review effectively.

4. Incomplete submission: The checklist in the PR description is empty, and many commits reference "WIP" or linting fixes.

What would be acceptable

Contributions that would be welcome:

• Bug fixes for Shopify Liquid compatibility
• Missing Shopify Liquid features or filters
• Performance improvements
• Better error messages

Custom filters should be added by users of the library, not included in the core library.

I recommend closing this PR. If you need these custom features, please maintain them in your fork (autopilot3/liquid).