ENH: add `create_diagonal` #97

	name: CI

	on:
	workflow_dispatch:
	pull_request:
	push:
	branches:
	- main

	concurrency:
	group: ${{ github.workflow }}-${{ github.ref }}
	cancel-in-progress: true

	env:
	# Many color libraries just need this to be set to any value, but at least
	# one distinguishes color depth, where "3" -> "256-bit color".
	FORCE_COLOR: 3

	jobs:
	pre-commit-and-lint:
	name: Format
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0
	- uses: actions/setup-python@v5
	with:
	python-version: "3.x"
	- uses: pre-commit/[email protected]
	with:
	extra_args: --hook-stage manual --all-files
	- uses: prefix-dev/[email protected]
	with:
	pixi-version: v0.30.0
	cache: true
	- name: Run Pylint & Mypy
	run: \|
	pixi run -e lint pylint
	pixi run -e lint mypy

	checks:
	name: Check ${{ matrix.environment }}
	runs-on: ${{ matrix.runs-on }}
	needs: [pre-commit-and-lint]
	strategy:
	fail-fast: false
	matrix:
	environment: [ci-py309, ci-py312]
	runs-on: [ubuntu-latest]

	steps:
	- uses: actions/checkout@v4
	with:
	fetch-depth: 0

	- uses: prefix-dev/[email protected]
	with:
	pixi-version: v0.30.0
	cache: true
	environments: ${{ matrix.environment }}

	- name: Test package
	run: pixi run -e ${{ matrix.environment }} test-ci

	# - name: Upload coverage report
	# uses: codecov/[email protected]
	# with:
	# token: ${{ secrets.CODECOV_TOKEN }}

Provide feedback