feat: started working on multihop swaps for v3 - #221

Codecov Report

❌ Patch coverage is 58.06452% with 26 lines in your changes missing coverage. Please review.
✅ Project coverage is 76.96%. Comparing base (e17818c) to head (2df147d).
⚠️ Report is 52 commits behind head on master.

@@            Coverage Diff             @@
##           master     #221      +/-   ##
==========================================
- Coverage   78.31%   76.96%   -1.36%     
==========================================
  Files          10       10              
  Lines         793      829      +36     
==========================================
+ Hits          621      638      +17     
- Misses        172      191      +19     

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This 2021 WIP no longer rebases into a coherent feature. Current master has since absorbed the surrounding v2/v3 refactors, while the branch's only surviving conflict-resolved delta is an unused _encode_path helper; v3 multihop quoting and swaps are still not wired or tested. I recommend closing this PR rather than force-pushing a misleading one-function fragment. The remaining feature request is already tracked by #95.

I cannot close or update the org-owned branch from the TimeToBuildBob account because it currently has read-only access to this repository.