Add tutorial to show how to use `pyvista-gmsh` which is inspired by `gmsh` tutorial #27

	name: Unit Testing and Deployment

	on:
	pull_request:
	workflow_dispatch:
	schedule:
	- cron: "0 4 * * *"
	push:
	tags:
	- "*"
	branches:
	- main

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

	env:
	ALLOW_PLOTTING: true
	SHELLOPTS: 'errexit:pipefail'

	jobs:
	Linux:
	name: Linux Unit Testing
	runs-on: ubuntu-latest
	strategy:
	fail-fast: false

	# see discussion at https://github.com/pyvista/pyvista/issues/2867
	matrix:
	include:
	- python-version: '3.11'
	vtk-version: 'latest'
	steps:
	- uses: actions/checkout@v3
	with:
	fetch-depth: 2

	- name: Set up Python ${{ matrix.python-version }}
	uses: actions/setup-python@v4
	with:
	python-version: ${{ matrix.python-version }}

	- uses: actions/cache@v3
	with:
	path: ~/.cache/pip
	key: Python-${{ runner.os }}-${{ matrix.python-version }}-${{ matrix.vtk-version }}-${{ hashFiles('setup.py') }}-${{ hashFiles('requirements_test.txt') }}
	restore-keys: \|
	Python-${{ runner.os }}-${{ matrix.python-version }}

	- name: Set up vtk
	if: ${{ matrix.vtk-version != 'latest' }}
	run: pip install vtk==${{ matrix.vtk-version }}

	- uses: awalsh128/cache-apt-pkgs-action@v1.0.3
	with:
	packages: libgl1-mesa-glx xvfb python-tk
	version: 1.0

	- name: Install gmsh
	run: pip install gmsh

	- name: Install Testing Requirements
	run: pip install -r requirements_test.txt

	- name: Unit Testing
	run: \|
	export PYTHONPATH=. && xvfb-run pytest

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