adds type annotations, move netcdf utils to `io` module #5

	name: ci

	on:
	pull_request:
	push:
	branches:
	- main

	defaults:
	run:
	shell: bash -leo pipefail {0}

	jobs:
	black:
	name: black
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v4
	- uses: ./.github/actions/setup
	- name: black
	run: "python -m black --check ."
	isort:
	name: isort
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v4
	- uses: ./.github/actions/setup
	- name: isort
	run: "python -m isort -c -v ."
	lint:
	name: ruff
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v4
	- uses: ./.github/actions/setup
	- name: lint
	run: "python -m ruff check"
	mypy:
	name: mypy
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v4
	- uses: ./.github/actions/setup
	- name: mypy
	run: "python -m mypy ."
	test:
	name: unittest
	runs-on: ubuntu-22.04
	steps:
	- uses: actions/checkout@v4
	- uses: ./.github/actions/setup
	- name: test
	run: "python -m unittest discover -v"

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