Add an HTTP API endpoint + UI widgets to stream logs (#49)

* Added JSON logs to Desktop

* Move logging config into librqbit for reuse

* Log printer now available in both Desktop and Web UI

* Fix JS type error

crates/librqbit/webui/src/context.tsx

@@ -27,6 +27,9 @@ export const APIContext = createContext<RqbitAPI>({
   delete: () => {
     throw new Error("Function not implemented.");
   },
+  getHttpBaseUrl: () => {
+    throw new Error("Function not implemented.");
+  },
 });
 export const AppContext = createContext<ContextType>({
   setCloseableError: (_) => {},