v4.0.0-alpha1

First alpha of Isaac Automator v4, major overhaul moving to source-based Isaac Sim/Lab installation.

• Isaac Sim and Isaac Lab are now installed from source (git) instead of Docker images, NGC and OV AMI references are removed
• Isaac Workstation is now the default instance role, provisioning a VM with Isaac Sim, Isaac Lab, and remote desktop access; more roles and Isaac Sim ecosystem packages will be added in the future
• Credential management now uses native AWS CLI storage, SSH and noVNC are split into separate commands with X11 forwarding and browser access from the Docker container
• NVIDIA drivers are updated, Azure GRID driver uses latest dynamic link
• Documentation updates and improvements

Full Changelog: https://github.com/isaac-sim/IsaacAutomator/commits/v4.0.0-alpha1