migrate the CI setup to pixi #663

	name: CI Additional

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

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

	jobs:
	doctests:
	name: Doctests
	runs-on: ubuntu-latest
	if: github.repository == 'xarray-contrib/pint-xarray'

	env:
	FORCE_COLOR: 3

	steps:
	- name: checkout the repository
	uses: actions/checkout@v4
	with:
	# need to fetch all tags to get a correct version
	fetch-depth: 0 # fetch all branches and tags

	- name: setup environment
	uses: prefix-dev/setup-pixi@8ca4608ef7f4daeb54f5205b20d0b7cb42f11143 # 0.8.14
	with:
	environments: "doctests"

	- name: import pint-xarray
	run: \|
	pixi run -e doctests python -c 'import pint_xarray'

	- name: run doctests
	run: \|
	pixi run -e doctests doctests

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