add help arg

good to go @gmarchment

bioflow_insight_cli/main.py

 import click
 
+import src as bioflow_insight_src
 from src.workflow import Workflow
 
 
 @click.command()
+@click.version_option(bioflow_insight_src.__version__)
 @click.argument('main_workflow_path')
 #@click.option('--author', 'author', required=False, help='Author name, extracted otherwise')
 @click.option('--name', 'name', required=False, help='Workflow name, extracted otherwise')