Add project management support and integrate customer-project functionality

internal_frontend/app/api/projects/customer/[customerId]/route.ts

@@ -0,0 +1,16 @@
+import {NextRequest, NextResponse} from "next/server";
+import {serverCall} from "@/lib/api/serverCall";
+import {projectRoutes} from "@/app/api/projects/projectRoutes";
+
+export async function GET(request: NextRequest) {
+    const segments = request.url.split('/');
+    const id = segments[segments.indexOf('customer') + 1];
+    const response = await serverCall(projectRoutes.getProjectByCustomerId(id), "GET");
+
+    if (!response.ok) {
+        return NextResponse.json({error: "Customer not found"}, {status: 404});
+    }
+
+    const customer = await response.json();
+    return NextResponse.json(customer);
+}