Breaks out wild-setup phases into independently-runnable scripts.

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.

setup/home-scaffold/README.md

@@ -4,23 +4,12 @@
 
 Congratulations! Everything you need for setting up and managing your wild-cloud is in this directory.
 
-The first step is to set up your configuration and secrets.
-
-```bash
-mv config.example.yaml config.yaml
-mv secrets.example.yaml secrets.yaml
-```
-
-> Configuration instructions TBD.
-
-Generate your custom setup:
+Just run:
 
 ```bash
 wild-setup
 ```
 
-Now, continue setup with your custom [setup instructions](./setup/README.md).
-
 ## Using your wild-cloud
 
 ### Installing Wild-Cloud apps