chore: add a makefile to run linter/testing/type safety check (cadence-workflow#42)

<!-- Describe what has changed in this PR -->
**What changed?**
add a makefile to run linter/testing/type safety check, now we can run
`make pr` to check all the linter etc. in one go.

<!-- Tell your future self why have you made these changes -->
**Why?**
it's sometimes confusion for all the different `uv run` commands to
either run test, linter.

<!-- How have you verified this change? Tested locally? Added a unit
test? Checked in staging env? -->
**How did you test it?**
only makefile

<!-- Assuming the worst case, what can be broken when deploying this
change to production? -->
**Potential risks**

<!-- Is it notable for release? e.g. schema updates, configuration or
data migration required? If so, please mention it, and also update
CHANGELOG.md -->
**Release notes**

<!-- Is there any documentation updates should be made for config,
https://cadenceworkflow.io/docs/operation-guide/setup/ ? If so, please
open an PR in https://github.com/cadence-workflow/cadence-docs -->
**Documentation Changes**

---------

Signed-off-by: Tim Li <[email protected]>

Author: timl3136

Makefile

@@ -0,0 +1,55 @@
+.PHONY: pr install lint type-check test integration-test clean generate help
+
+# Run all PR checks locally
+pr: install generate lint type-check test integration-test
+	@echo "All PR checks passed!"
+
+# Install dependencies
+install:
+	@echo "Installing dependencies..."
+	uv sync --extra dev
+
+# Generate idl files
+generate:
+	@echo "Generating type files based on IDL..."
+	uv run python scripts/generate_proto.py
+
+# Run linter
+lint:
+	@echo "Running Ruff linter and fixing lint issues..."
+	uv tool run ruff check --fix
+
+# Run type checker
+type-check:
+	@echo "Running mypy type checker..."
+	uv tool run mypy cadence/
+
+# Run unit tests
+test:
+	@echo "Running unit tests..."
+	uv run pytest -v
+
+# Run integration tests
+integration-test:
+	@echo "Running integration tests..."
+	uv run pytest -v --integration-tests
+
+# Clean generated files and caches
+clean:
+	@echo "Cleaning up..."
+	find . -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true
+	find . -type f -name "*.pyc" -delete 2>/dev/null || true
+	find . -type d -name "*.egg-info" -exec rm -rf {} + 2>/dev/null || true
+
+# Show help
+help:
+	@echo "Available targets:"
+	@echo "  make pr              - Run all PR checks (recommended before submitting PR)"
+	@echo "  make install         - Install dependencies"
+	@echo "  make lint            - Run Ruff linter"
+	@echo "  make type-check      - Run mypy type checker"
+	@echo "  make test            - Run unit tests"
+	@echo "  make integration-test - Run integration tests"
+	@echo "  make clean           - Remove generated files and caches"
+	@echo "  make help            - Show this help message"
+