Settle on v1 setup method. Test run completed successfully from bootstrap to service setup.

- Refactor dnsmasq configuration and scripts for improved variable handling and clarity
- Updated dnsmasq configuration files to use direct variable references instead of data source functions for better readability.
- Modified setup scripts to ensure they are run from the correct environment and directory, checking for the WC_HOME variable.
- Changed paths in README and scripts to reflect the new directory structure.
- Enhanced error handling in setup scripts to provide clearer guidance on required configurations.
- Adjusted kernel and initramfs URLs in boot.ipxe to use the updated variable references.

setup/cluster-nodes/patch.templates/worker.yaml

@@ -0,0 +1,22 @@
+machine:
+  install:
+    disk: /dev/sdc
+  network:
+    interfaces:
+      - interface: enp4s0
+        dhcp: true
+  kubelet:
+    extraMounts:
+      - destination: /var/lib/longhorn
+        type: bind
+        source: /var/lib/longhorn
+        options:
+          - bind
+          - rshared
+          - rw
+# NOTE: System extensions need to be added via Talos Image Factory
+# customization:
+#   systemExtensions:
+#     officialExtensions:
+#       - siderolabs/iscsi-tools
+#       - siderolabs/util-linux-tools