feat: add product review and rating system with schema update

apps/backend/src/routes/reviews.ts

@@ -0,0 +1,49 @@
+import { Elysia, t } from "elysia";
+import prisma from "../lib/prisma";
+
+export const reviewsRoute = new Elysia({ prefix: "/reviews" })
+  .get("/product/:productId", async ({ params: { productId } }) => {
+    return await prisma.review.findMany({
+      where: { 
+        productId: Number(productId),
+        isPublished: true 
+      },
+      orderBy: { createdAt: 'desc' },
+      include: {
+        customer: {
+          select: {
+            displayName: true,
+            pictureUrl: true
+          }
+        }
+      }
+    });
+  })
+  .post("/", async ({ body, set }) => {
+    try {
+      const data = body as any;
+      const review = await prisma.review.create({
+        data: {
+          rating: data.rating,
+          comment: data.comment,
+          productId: data.productId,
+          customerId: data.customerId || null,
+          customerName: data.customerName || "Anonymous",
+          isPublished: true
+        }
+      });
+      return review;
+    } catch (err) {
+      console.error("[Reviews] Error:", err);
+      set.status = 500;
+      return { error: "Failed to create review" };
+    }
+  }, {
+    body: t.Object({
+      rating: t.Number(),
+      comment: t.Optional(t.String()),
+      productId: t.Number(),
+      customerId: t.Optional(t.Nullable(t.Number())),
+      customerName: t.Optional(t.String())
+    })
+  });