Fix Publish Wiki workflow configuration

[Copilot]

The Publish Wiki workflow was failing with fatal: this operation must be run in a work tree because Andrew-Chen-Wang/github-wiki-action@v4 was configured with environment variables instead of action inputs.

Changes

• Replace incorrect env: configuration with proper with: inputs
• Set path: docs to specify wiki source directory
• Remove unused env vars (WIKI_DIR, GH_TOKEN, GH_MAIL, GH_NAME) — token defaults to github.token

# Before
- uses: Andrew-Chen-Wang/github-wiki-action@v4
  env:
    WIKI_DIR: docs/
    GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}

# After
- uses: Andrew-Chen-Wang/github-wiki-action@v4
  with:
    path: docs

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Publish wiki job is failing</issue_title>
<issue_description></issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Publish wiki job is failing #45

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.