fix(sdk): include tools/*.md in Python wheel package data

[tupizz]

Closes [SD-2424]
https://linear.app/superdocworkspace/issue/SD-2424/bug-python-sdk-120-wheel-omits-system-promptmd-and-breaks-get-system

Summary

• Python SDK 1.2.0 wheel omits system-prompt.md, causing get_system_prompt() to throw TOOLS_ASSET_NOT_FOUND at runtime
• Root cause: pyproject.toml package-data only included tools/*.json, not tools/*.md
• Fix: add "tools/*.md" to the [tool.setuptools.package-data] glob list

Root cause

In packages/sdk/langs/python/pyproject.toml, the package-data section was:

[tool.setuptools.package-data]
superdoc = [
  "skills/*.md",
  "tools/*.json",
]

The skills/*.md glob correctly includes markdown files from the skills directory (e.g., editing-docx.md), but tools/*.json only matches JSON tool catalogs. tools/system-prompt.md was silently excluded from the built wheel.

At runtime, tools_api.py:201 calls importlib.resources.files('superdoc').joinpath('tools', 'system-prompt.md') which raises FileNotFoundError because the file was never packaged.

How to reproduce locally

cd packages/sdk/langs/python

# 1. Build the wheel
rm -rf dist build superdoc_sdk.egg-info
python3 -m build --wheel

# 2. Check if system-prompt.md is in the wheel (it won't be on main)
unzip -l dist/superdoc_sdk-1.2.0-py3-none-any.whl | grep system-prompt

# 3. Install in an isolated venv
python3 -m venv /tmp/superdoc-test-venv
source /tmp/superdoc-test-venv/bin/activate       # bash/zsh
# source /tmp/superdoc-test-venv/bin/activate.fish  # fish shell
pip install dist/superdoc_sdk-1.2.0-py3-none-any.whl --no-deps --force-reinstall

# 4. Test from OUTSIDE the source tree (critical — running from the source
#    directory masks the bug because Python adds cwd to sys.path and finds
#    the local superdoc/ package which has the file)
cd /tmp
python3 -c "from superdoc.tools_api import get_system_prompt; print(get_system_prompt()[:80])"

Before fix: step 2 returns nothing, step 4 throws SuperDocError: System prompt not found.
After fix: step 2 shows superdoc/tools/system-prompt.md, step 4 prints the prompt.

Test plan

• Build the wheel: cd packages/sdk/langs/python && python3 -m build --wheel
• Verify system-prompt.md is in the wheel: unzip -l dist/*.whl | grep system-prompt
• Install in isolated venv and call get_system_prompt() from outside the source tree
• Verify existing JSON tool assets are still included: unzip -l dist/*.whl | grep tools/

[superdoc-bot]

🎉 This PR is included in superdoc-sdk v1.3.0-next.50

[superdoc-bot]

🎉 This PR is included in superdoc-sdk v1.4.0