Cross-link FormalSLT README to live TheoremPath portfolio surface

[Robby955]

Summary

This PR adds one README link from FormalSLT to the live TheoremPath walkthrough for the v0.1 proof surface.

The link points to:

https://theorempath.com/theorems/formalslt-v0-1

Verification

• python3 scripts/audit_public_writing.py README.md
• git diff --check README.md

No Lean files are changed.

Summary by CodeRabbit

• Documentation
  • Added a link to the live walkthrough for v0.1 reference material.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: 0241b722-5d5d-4d2c-9eff-e6ce77963788

📥 Commits

Reviewing files that changed from the base of the PR and between 9cc6133 and c5946dd.

📒 Files selected for processing (1)

• README.md

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📝 Walkthrough

Walkthrough

This PR adds a documentation reference to the README.md file, inserting a new bullet point that links readers to a live walkthrough of the formalslt-v0-1 theorem available on theorempath.com.

Changes

Documentation Update

Layer / File(s)	Summary
Live walkthrough reference link README.md	A new bullet point is added under the v0.1 technical documentation section, providing a link to the interactive walkthrough on theorempath.com.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

🐰 A link appears in lines so neat,
To theorems in the digital street,
Where formalslt now shows its face,
On theorempath's welcoming space! ✨

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly describes the main change: adding a cross-link in the FormalSLT README to the live TheoremPath portfolio surface, which directly matches the changeset's addition of a link to theorempath.com/theorems/formalslt-v0-1.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch feature/v0.1-docs-package-2026-06-01

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