refactor ♻️: Preflight: Snippets configuration check

This commit refactors the preflight task to intelligently check if the 'snippets' configuration is already present in the `/etc/pve/storage.cfg` file.  It avoids redundant replacement operations and improves the preflight process by determining if the configuration is already set, preventing unnecessary modifications.

tasks/testing.yml

@@ -10,23 +10,24 @@
         state: present
         update_cache: yes
 
-
-    # - name: "[PREFLIGHT] Ensure 'snippets' is enabled for {{ proxmox_snippets_storage }}"
-    #   ansible.builtin.replace:
-    #     path: /etc/pve/storage.cfg
-    #     regexp: '(dir:\s*{{ proxmox_snippets_storage }}[\s\S]*?content\s+)(.*)(?<!snippets)'
-    #     replace: '\1\2,snippets'
-    #   vars: 
-    #     proxmox_snippets_storage: local
-
-    - name: "Ensure 'snippets' is enabled for {{ proxmox_snippets_storage }}"
-      ansible.builtin.replace:
-        path: /etc/pve/storage.cfg
-        regexp: '(?ms)(dir:\s*{{ proxmox_snippets_storage }}\b.*?content\s*=\s*(?!.*snippets)([^ \n]+))'
-        replace: '\1,snippets'
-      vars:
+    - name: "[PREFLIGHT] Check if 'snippets' is already enabled for {{ proxmox_snippets_storage }}"
+      ansible.builtin.command: "grep -E 'dir:\\s*{{ proxmox_snippets_storage }}' -A5 /etc/pve/storage.cfg"
+      register: snippets_check
+      failed_when: false
+      changed_when: false
+      vars: 
         proxmox_snippets_storage: local
 
+    - name: "[PREFLIGHT] Determine whether 'snippets' is already configured"
+      ansible.builtin.set_fact:
+        snippets_already_present: "{{ 'snippets' in snippets_check.stdout }}"
+
+    - name: "[PREFLIGHT] Ensure 'snippets' is enabled for {{ proxmox_snippets_storage }}"
+      ansible.builtin.replace:
+        path: /etc/pve/storage.cfg
+        regexp: '(dir:\s*{{ proxmox_snippets_storage }}[\s\S]*?content\s+)(.*)(?<!snippets)'
+        replace: '\1\2,snippets'
+      when: not snippets_already_present
 
     - name: "[PREFLIGHT] Ensure snippets storage directory exists"
       ansible.builtin.file: