Move the external API into its own router

Auth logic isn't shared between the clients anyway, so co-locating them is confusing since you can't use the same clients to call both. This also makes the codegen clients less verbose.

app/src/server/api/root.router.ts

@@ -8,7 +8,6 @@ import { evaluationsRouter } from "./routers/evaluations.router";
 import { worldChampsRouter } from "./routers/worldChamps.router";
 import { datasetsRouter } from "./routers/datasets.router";
 import { datasetEntries } from "./routers/datasetEntries.router";
-import { externalApiRouter } from "./routers/externalApi.router";
 import { projectsRouter } from "./routers/projects.router";
 import { dashboardRouter } from "./routers/dashboard.router";
 import { loggedCallsRouter } from "./routers/loggedCalls.router";
@@ -31,7 +30,6 @@ export const appRouter = createTRPCRouter({
   projects: projectsRouter,
   dashboard: dashboardRouter,
   loggedCalls: loggedCallsRouter,
-  externalApi: externalApiRouter,
 });
 
 // export type definition of API