feat: implement user authentication and dashboard

Adds a complete user authentication system and a protected dashboard.

- Implements JWT-based authentication using ElysiaJS.
- Integrates Prisma for database access and user management.
- Creates a login page and protected routes for the dashboard.
- Adds a dashboard layout with pages for API key management.
- Includes necessary UI components from Mantine.

prisma/schema.prisma

@@ -0,0 +1,31 @@
+generator client {
+  provider = "prisma-client-js"
+  output   = "../generated/prisma"
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
+
+model User {
+  id        String   @id @default(cuid())
+  name      String?
+  email     String?  @unique
+  password  String?
+  createdAt DateTime @default(now())
+  updatedAt DateTime @updatedAt
+  ApiKey    ApiKey[]
+}
+
+model ApiKey {
+  id          String    @id @default(cuid())
+  User        User?     @relation(fields: [userId], references: [id])
+  userId      String
+  name        String
+  key         String    @unique @db.Text
+  description String?
+  expiredAt   DateTime?
+  createdAt   DateTime  @default(now())
+  updatedAt   DateTime  @updatedAt
+}