feat: add polygons around calendar months #50

	name: Check Code Formatting

	on:
	pull_request:
	branches:
	- main

	jobs:
	check-formatting:
	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Set up Python
	uses: actions/setup-python@v4
	with:
	python-version: "3.9"

	- name: Install Ruff
	run: pip install ruff==0.9.10

	- name: Run Ruff format check
	run: ruff format --check .

	- name: Run Ruff linting and auto-fix
	run: ruff check --fix .

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