Feature/docker compose support

[kawata-yuya]

what's changed

This PR supports Docker compose to improve build and run container processes.
By setting the virtualenv path to /opt/venv, I resolved the issue where uv virtualenv was copied to the host when the workspace was mounted.

• Supports Docker compose
• Change uv virtualenv path from /dev_ws/python_simple_mppi/.venv to /opt/venv
  • This prevents .venv from being created in the host machine's workspace during mounting, keeping the host environment clean.
• Change README.md

Changes in the Docker startup process

Before

# First, explicit Docker image build is required.
docker build -t dev_mppi:v1.1 -f docker/Dockerfile .
docker run -it -v .:/dev_ws/python_simple_mppi --name dev_mppi_container dev_mppi:v1.1 bash

After

# just one line
docker compose run --rm dev

[MizuhoAOKI]

@kawata-yuya
Thank you for the PR! I am sorry for the late response, I've been quite busy recently.

This looks like a nice improvement. I'll review it properly as soon as I get some time. I appreciate your patience.