refactor(vars): add system/hypervisor dict inputs

- Normalize new system_cfg + hypervisor_cfg and keep legacy vm_* and hypervisor_* aliases

- Support multiple system.disks (creation + optional mount + fstab generation)

- Add system_check safety role (production + existing system detection)

- Update README and example inventories

roles/configuration/tasks/grub.yml

@@ -106,7 +106,7 @@
       when: configuration_grub_bls_entries.files | length > 0
       ansible.builtin.lineinfile:
         path: "{{ item.path }}"
-        regexp: '^options '
+        regexp: "^options "
         line: "options {{ configuration_kernel_cmdline_base }}"
       loop: "{{ configuration_grub_bls_entries.files }}"
       loop_control:
@@ -116,5 +116,5 @@
   when: partitioning_grub_enable_cryptodisk | bool
   ansible.builtin.lineinfile:
     path: /mnt/etc/default/grub
-    regexp: '^GRUB_ENABLE_CRYPTODISK='
+    regexp: "^GRUB_ENABLE_CRYPTODISK="
     line: GRUB_ENABLE_CRYPTODISK=y