Add agent support templates and profiles

profiles/python.md

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+# Python Profile
+
+Use when the repository has `pyproject.toml`, `requirements.txt`, or Python source files.
+
+## Commands
+
+Prefer existing tooling. Common examples:
+
+```text
+INSTALL_COMMAND = python -m pip install -r requirements.txt
+LINT_COMMAND = ruff check .
+TEST_COMMAND = pytest
+BUILD_COMMAND = python -m build
+AUDIT_COMMAND = pip-audit
+```
+
+If the project uses `uv`, prefer:
+
+```text
+INSTALL_COMMAND = uv sync
+TEST_COMMAND = uv run pytest
+AUDIT_COMMAND = uv pip audit
+```
+
+## Ignore Additions
+
+```text
+.venv/
+venv/
+__pycache__/
+.pytest_cache/
+dist/
+build/
+*.egg-info/
+```
+