Split dev env settings to development settings file (#1424)

* Move dev urls to appsettings.Development.json

* Move bitwarden license dev urls

src/Admin/appsettings.Development.json

@@ -15,6 +15,10 @@
       "internalVault": "http://localhost:4001",
       "internalSso": "http://localhost:51822",
       "internalPortal": "http://localhost:52313"
+    },
+    "send": {
+      "connectionString": "SECRET",
+      "baseUrl": "http://localhost:4000/sendfiles/"
     }
   }
 }