feat: add config btn and modal to view and copy config (#2289)

* add view config btn and modal

* show loading state

* add note about keyboard

src/i18n/locales/en.json

@@ -117,7 +117,9 @@
     "notConnected": "Client not connected",
     "endpoint": "Endpoint",
     "endpointDesc": "IP of the client from which the WireGuard connection is established",
-    "search": "Search clients..."
+    "search": "Search clients...",
+    "config": "Configuration",
+    "viewConfig": "View Configuration"
   },
   "dialog": {
     "change": "Change",
@@ -238,6 +240,12 @@
     "preDown": "PreDown",
     "postDown": "PostDown"
   },
+  "copy": {
+    "notSupported": "Copy is not supported",
+    "copied": "Copied!",
+    "failed": "Copy failed",
+    "copy": "Copy"
+  },
   "awg": {
     "jCLabel": "Junk packet count (Jc)",
     "jCDescription": "Number of junk packets to send (1-128, recommended: 4-12)",