Allow for `labs.yml` definition in target repositories:
```
---
name: dbx
context: workspace
description: Databricks CLI extensions
hooks:
install: install.py
entrypoint: main.py
commands:
- name: foo
description: foo command
flags:
- name: first
description: first flag description
- name: second
description: second flag description
- name: bar
description: bar command
flags:
- name: first
description: first flag description
- name: second
description: second flag description
```
and simple command entry points that are aware of both CLI flags and Unified Authentication env variables:
```
import os, sys, json
print(f'host is {os.environ["DATABRICKS_HOST"]}')
payload = json.loads(sys.argv[1])
print(f'[{payload["command"]}]: flags are {payload["flags"]}')
answer = input('What is your name? ')
print(f'got answer: {answer}')
answer = input('Preferences? ')
print(f'got answer: {answer}')
```
Serge Smertin