feat(dashboard): setting up layout

apps/api/src/trpc/routers/_app.ts

@@ -0,0 +1,13 @@
+import type { inferRouterInputs, inferRouterOutputs } from "@trpc/server";
+
+import { createTRPCRouter } from "@/trpc/init";
+import { sourcesRouter } from "@/trpc/routers/sources";
+
+export const appRouter = createTRPCRouter({
+  sources: sourcesRouter,
+});
+
+// export type definition of API
+export type AppRouter = typeof appRouter;
+export type RouterOutputs = inferRouterOutputs<AppRouter>;
+export type RouterInputs = inferRouterInputs<AppRouter>;