Add erc4626

[andrew-fleming]

WIP

Fixes #???

PR Checklist

• Tests
• Documentation
• Added entry to CHANGELOG.md
• Tried the feature on a public network

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.00%. Comparing base (bf5d02c) to head (33bd0d4).
Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1170      +/-   ##
==========================================
+ Coverage   88.87%   89.00%   +0.13%     
==========================================
  Files          57       57              
  Lines        1375     1392      +17     
==========================================
+ Hits         1222     1239      +17     
  Misses        153      153              

Files with missing lines	Coverage Δ
packages/utils/src/math.cairo	100.00% <100.00%> (ø)

... and 2 files with indirect coverage changes

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