feat: implement blog project with CI pipeline

docs/development/codestyle.md

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+# Code Style
+
+## Linting & Formatting
+
+```bash
+# Run all linters
+uv run ruff check . --fix
+uv run ruff format .
+uv run isort . --profile black --filter-files
+
+# Type checking
+uv run mypy .
+```
+
+## Documentation
+
+```bash
+# Check docstring style
+uv run pydocstyle app/
+
+# Check documentation coverage
+uv run interrogate app/ -v
+
+# Build documentation
+uv run mkdocs build
+
+# Serve documentation locally
+uv run mkdocs serve
+```
+
+## Pre-commit Hooks
+
+This project uses pre-commit hooks to ensure code quality:
+
+- ruff check
+- ruff format
+- isort
+- mypy
+
+Install hooks:
+```bash
+uv run pre-commit install
+```