docs: Exclude test-snaps from README graph

[Mrtenz]

This excludes test-snaps from the graph in the README.

---

Note

Exclude packages/test-snaps from README’s generated dependency graph and package list.

• README generation script (scripts/update-readme-content.mts):
  • Update retrieveWorkspaces filter to also exclude packages/test-snaps, in addition to packages/examples/, from workspace processing.
  • Effectively removes test-snaps from the generated dependency graph and package list in the README.

^{Written by Cursor Bugbot for commit 78943f0. This will update automatically on new commits. Configure here.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.28%. Comparing base (0970e9e) to head (78943f0).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #3727   +/-   ##
=======================================
  Coverage   98.28%   98.28%           
=======================================
  Files         418      418           
  Lines       12162    12162           
  Branches     1880     1880           
=======================================
  Hits        11953    11953           
  Misses        209      209           

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