Clean up repo for public release

- Remove unnecessary files (tool_test_report.md, python/, pyproject.toml)
- Remove internal docs (rlm_gap_analysis, VOICE_AND_TONE, PALETTE)
- Remove pypi publish workflow
- Fix clippy and rustdoc warnings for CI
- Add note that Duo mode is experimental

🤖 Generated with [Claude Code](https://claude.ai/code)

.github/workflows/publish.yml

@@ -1,29 +0,0 @@
-name: publish
-
-on:
-  workflow_dispatch:
-  push:
-    tags:
-      - "v*"
-
-permissions:
-  id-token: write
-  contents: read
-
-jobs:
-  pypi:
-    runs-on: ubuntu-latest
-    environment: pypi
-    steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-python@v5
-        with:
-          python-version: "3.11"
-      - name: Build package
-        run: |
-          python -m pip install --upgrade pip build
-          python -m build
-      - name: Publish to PyPI
-        uses: pypa/gh-action-pypi-publish@release/v1
-        with:
-          skip-existing: true