add nextjs and migrated api to next api

apps/web/src/server/api/routers/example.ts

@@ -0,0 +1,25 @@
+import { z } from "zod";
+
+import {
+  createTRPCRouter,
+  protectedProcedure,
+  publicProcedure,
+} from "@/server/api/trpc";
+
+export const exampleRouter = createTRPCRouter({
+  hello: publicProcedure
+    .input(z.object({ text: z.string() }))
+    .query(({ input }) => {
+      return {
+        greeting: `Hello ${input.text}`,
+      };
+    }),
+
+  getAll: publicProcedure.query(({ ctx }) => {
+    return ctx.db.example.findMany();
+  }),
+
+  getSecretMessage: protectedProcedure.query(() => {
+    return "you can now see this secret message!";
+  }),
+});