label OCI manager Apps as a Technology Preview, as Proxmox VE does

- OCI manager Apps carries the Technology Preview label that Proxmox VE gives to application containers from OCI images, in the main menu, the engine windows, the menu search, the message at the end of each installation, the release notes and the documentation.
- The documentation explains that the label refers to the Proxmox VE support it runs on, not to the ProxMenux engine, and stays until Proxmox VE marks it as stable.
- Spanish for the new message; the other languages are left to the translation bot.

scripts/menus/main_menu.sh

@@ -73,7 +73,7 @@ show_menu() {
             4 "$(translate "Disk Manager")" \
             5 "$(translate "Storage & Share Manager")" \
             6 "$(translate "Proxmox VE Helper Scripts")" \
-            o "$(translate "OCI manager Apps (beta)")" \
+            o "$(translate "OCI manager Apps (Technology Preview)")" \
             7 "$(translate "Network Management")" \
             8 "$(translate "Security")" \
             9 "$(translate "Utilities and Tools")" \

scripts/menus/search_index.json

@@ -36,8 +36,8 @@
     "keywords": ""
   },
   {
-    "title": "OCI manager Apps (beta)",
-    "menu": "OCI manager Apps (beta)",
+    "title": "OCI manager Apps (Technology Preview)",
+    "menu": "OCI manager Apps (Technology Preview)",
     "script": "oci/oci_manager_apps.sh",
     "keywords": "docker container image contenedor imagen apps"
   },