refactor(schema): move filesystem into system dictionary

roles/global_defaults/defaults/main.yml

@@ -21,6 +21,7 @@ system_defaults:
   type: "virtual" # virtual|physical
   os: ""
   version: ""
+  filesystem: ""
   name: ""
   id: ""
   cpus: 0

roles/global_defaults/tasks/system.yml

@@ -16,6 +16,7 @@
     system_raw: "{{ system_defaults | combine(system, recursive=True) }}"
     system_type: "{{ system_raw.type | string | lower }}"
     system_os_input: "{{ system_raw.os | default('') | string | lower }}"
+    system_filesystem_input: "{{ system_raw.filesystem | default('') | string | lower }}"
     system_name: >-
       {{
         system_raw.name | string | trim
@@ -100,6 +101,7 @@
       type: "{{ system_type }}"
       os: "{{ system_os_input if system_os_input | length > 0 else ('archlinux' if system_type == 'physical' else '') }}"
       version: "{{ system_raw.version | default('') | string }}"
+      filesystem: "{{ system_filesystem_input }}"
       name: "{{ system_name }}"
       id: "{{ system_raw.id | default('') | string }}"
       cpus: "{{ [system_raw.cpus | default(0) | int, 0] | max }}"

roles/global_defaults/tasks/validation.yml

@@ -10,8 +10,8 @@
       - hypervisor_cfg is mapping
       - hypervisor_type is defined
       - hypervisor_type in ["libvirt", "proxmox", "vmware", "xen", "none"]
-      - filesystem is defined
-      - filesystem in ["btrfs", "ext4", "xfs"]
+      - system_cfg.filesystem is defined
+      - system_cfg.filesystem in ["btrfs", "ext4", "xfs"]
       - install_drive is defined
       - install_drive | string | length > 0
       - hostname is defined
@@ -272,7 +272,7 @@
       - (system_cfg.disks[0].size | float) > 0
       - (system_cfg.disks[0].size | float) >= 20
       - >-
-        filesystem != "btrfs"
+        system_cfg.filesystem != "btrfs"
         or (
           (system_cfg.disks[0].size | float)
           >= (