feat: VPN toggle (#689)

* feat: configurable VPN toggle for Wireguard

- Added VPN service for wg-quick
- Added VPN toggle to utilities quick toggles
- Configuration in UtilitiesConfig (enabled, connectionName)

* fix:  monitoring and toasts

- Using nmcli monitor for state detection instead of polling
- Added VPN toast notifications

* fix: use polkit

* feat: multi-provider VPN support

- Added support for netbird and tailscale providers
- Universal interface detection using ip link show
- Provider-specific privilege handling (pkexec only for wireguard)
- Updated README with VPN configuration examples

* feat: less hardcoded, configurable providers

* removed comments

* code style changes

* reorganize signal handler

1 files changed, 12 insertions, 1 deletions

diff --git a/README.md b/README.md
index a9b8fbf..5972821 100644
--- a/README.md
+++ b/README.md
@@ -589,7 +589,18 @@ default, you must create it manually.
             "dndChanged": true,
             "gameModeChanged": true,
             "kbLayoutChanged": true,
-            "numLockChanged": true
+            "numLockChanged": true,
+            "vpnChanged": true,
+        },
+        "vpn": {
+            "enabled": false,
+            "provider": [
+                {
+                    "name": "wireguard",
+                    "interface": "your-connection-name",
+                    "displayName": "Wireguard (Your VPN)"
+                }
+            ]
         }
     }
 }