feat(webtop): phonebook sync

Author: gsanchietti

webtop.rst

@@ -1197,3 +1197,63 @@ through the `NethService category`_ in the Nethesis online shop.
 
 Once the purchase is completed, Nethesis will provide instructions to
 activate the license and configure the PEC Bridge.
+
+NethVoice phonebook integration
+===============================
+
+Inside the WebTop application there is an automated workflow that allows to:
+
+- export the WebTop phonebook to the NethVoice phonebook
+- import the NethVoice phonebook to the WebTop phonebook
+
+TODO:
+- describe how to select
+
+
+- **Every night**, a script detects all address books shared with the admin user and 
+  imports them into the phonebook.
+
+From Webtop to NethVoice
+------------------------
+
+To add contacts from any WebTop 5 address book to the **Centralized Phonebook**, 
+simply share it with the system **"admin" user** (named **'NethServer Enterprise Administrator'**).
+
+Prerequisites
+
+
+- If the **admin** user is not available as a sharing option, it means that their 
+  profile does not yet exist on WebTop (because they have never logged in).
+- In this case, activate the profile by either logging in once 
+
+**Important:**
+  The address book must be shared directly with the **admin user**.  
+  If shared with a group containing the admin user, it **must also be shared individually** with the admin.
+
+
+- Ensure that only **individual address books** are shared and **not the entire category**, 
+  to prevent script errors.
+
+
+From NethVoice to WebTop
+------------------------
+
+- Every night, a script **imports the contents of the Centralized Phonebook** into 
+  WebTop 5 under the **admin user’s** account.
+- This newly created address book is named **"Rubrica Centralizzata"**.
+
+Access and Sharing
+
+
+- To access **admin’s** resources on WebTop 5, a **full domain login** is required 
+  (e.g., ``[email protected]``).
+- To allow other **groupware users** to access the address book, share it with them as **READ-ONLY**.
+- To share it with all users, select the **"Users"** group.
+
+Manual Synchronization
+----------------------
+
+To **manually force synchronization** and verify correct configuration, run the following 
+command from the shell: ::
+
+   TODO