Let developers override the whole transport

The developer setting that overrode the LiveKit service URL becomes a
JSON transport, so that a `url`-only or combined transport can be tested
against a homeserver that does not advertise one yet. The settings modal
shows each LiveKit room's role instead of a never-populated isLocal flag.

src/room/InCallView.tsx

@@ -694,18 +694,19 @@ export const InCallView: FC<InCallViewProps> = ({
             tab={settingsTab}
             onTabChange={setSettingsTab}
             developerSettingsVm={developerSettingsVm}
-            livekitRooms={allConnections.map((connectionItem) => ({
-              room: connectionItem.livekitRoom,
-              livekitAlias: connectionItem.livekitAlias,
-              // TODO compute is local or tag it in the livekit room items already
-              isLocal: undefined,
-              url:
-                // It should be relatively clear to the user which kind of URL
-                // this is, based on the scheme (ws:// vs. http://)
-                "url" in connectionItem.transport
-                  ? connectionItem.transport.url
-                  : connectionItem.transport.livekit_service_url,
-            }))}
+            livekitRooms={allConnections.map(
+              ({ livekitRoom: room, livekitAlias, transport, role }) => ({
+                room,
+                livekitAlias,
+                role,
+                url:
+                  // It should be relatively clear to the user which kind of URL
+                  // this is, based on the scheme (ws:// vs. http://)
+                  "url" in transport
+                    ? transport.url
+                    : transport.livekit_service_url,
+              }),
+            )}
           />
         </>
       )}