Remove deprecated scripts and add Talos schema mappings
- Deleted the following scripts as they are no longer needed:
- create-installer-image.sh
- detect-node-hardware.sh
- generate-machine-configs.sh
- Added a new file `talos-schemas.yaml` to maintain mappings of Talos versions to their corresponding schematic IDs for wild-cloud deployments.
- Updated the README in the home scaffold to simplify the initial setup instructions.
