add install package and workflow for usecase #1

	# This workflow will install the environment, run the usecase param_wall

	name: Tests for pgdrome

	on: [push]

	env:
	CACHE_NUMBER: 1 # increase to reset cache manually

	jobs:
	usecase:
	runs-on: ubuntu-latest

	steps:
	- name: checkout repo content
	uses: actions/checkout@v2
	- name: Setup Mambaforge
	uses: conda-incubator/setup-miniconda@v2
	with:
	miniforge-variant: Mambaforge
	miniforge-version: latest
	activate-environment: fenicsxconcrete
	use-mamba: true

	- name: Set cache date
	run: echo "DATE=$(date +'%Y%m%d')" >> $GITHUB_ENV

	- uses: actions/cache@v2
	with:
	path: "/usr/share/miniconda3/envs/amworkflow"
	key: conda-${{ hashFiles('environment.yml') }}-${{ env.DATE }}-${{ env.CACHE_NUMBER }}
	id: cache

	- name: Update environment
	run: mamba env update -n amworkflow -f environment.yml
	if: steps.cache.outputs.cache-hit != 'true'

	- name: Install package
	run: git clone https://github.com/tpaviot/pythonocc-utils.git && cd pythonocc-utils && pip install -e .

	- name: Run param_wall
	shell: bash -l {0} #new shell
	run: \|
	python usecases/param_wall/param_wall.py

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