[Feature Request]: Run commands from herd.yml file

[wpalani]

When running herd init it would be nice to be able to define some commands in the herd.yml file that get executed as part of the init.

It could be as simple as executing a relative bash script or other inline commands.

example (see the run step):

name: herd-website
php: '8.3'
secured: true
aliases:
    - herd-laravel
services:
    mysql:
        version: 8.0.36
        port: '${DB_PORT}'
    redis:
        version: 7.0.0
        port: '${REDIS_PORT}'
run:
    - /scripts/my-script