feat: implement MainForm component and set up routing; add user table schema and trigger in SQL

frontend/src/App.tsx

@@ -1,12 +1,12 @@
 import "./App.css";
 import { BrowserRouter, Route, Routes } from "react-router-dom";
-import { Inputs } from "./pages/Inputs";
+import { MainForm } from "./pages/MainForm";
 
 function App() {
   return (
     <BrowserRouter>
       <Routes>
-        <Route path="/" element={<Inputs />} />
+        <Route path="/" element={<MainForm />} />
       </Routes>
     </BrowserRouter>
   );