Tiago pro, docs, docker changes

[dtotsila]

This pull request introduces a streamlined, production-ready developer workflow for the ROS 2 Vive Controller project. The main changes include the addition of a .env-based configuration system, a new Makefile for simplified Docker management, and significant improvements to the documentation for clarity and usability. The entrypoint script for CI environments has also been added. These changes make setup, deployment, and hardware mapping much easier and more robust.

Developer Workflow & Configuration

• Added a .env.template file to standardize configuration of Steam credentials, ROS domain ID, scaling factors, and hardware serials; users now copy and edit .env for their setup.
• The Makefile now automates all Docker build, run, and utility commands (e.g., build, pull, calibrate, identify, stop, clean), sourcing .env variables and providing robot-specific targets for deployment.

Documentation Improvements

• Completely rewrote the README.md to reflect the new workflow: clarified prerequisites, added step-by-step configuration and deployment instructions, documented the new Makefile commands, and improved explanations of the driver node, TF tree, and hardware mapping.

Continuous Integration

• Added .ci/entrypoint.sh to ensure ROS and workspace environments are sourced correctly in CI/CD and Docker environments.