Add Pothos-generated User GraphQL schema and resolver

This commit adds the Pothos-generated User GraphQL schema and resolver. The schema is defined in the `src/graphql/graphql.schema.ts` file, and the resolver is defined in the `src/graphql/graphql.resolver.ts` file. The schema includes the `User` object type with fields for `id`, `name`, and `email`. The resolver includes a query field `users` that resolves to fetch all users from the Prisma database.

src/app.module.ts

@@ -1,22 +1,8 @@
 import { Module } from '@nestjs/common';
-import { GraphQLModule } from '@nestjs/graphql';
-import { ApolloDriver, ApolloDriverConfig } from '@nestjs/apollo';
-import { AppController } from './app.controller';
-import { AppService } from './app.service';
 import { GraphqlModule } from './graphql/graphql.module';
-import { join } from 'path';
-import { PrismaService } from './prisma/prisma.service';
+import { PrismaModule } from './prisma/prisma.module';
 
 @Module({
-  imports: [
-    GraphQLModule.forRoot<ApolloDriverConfig>({
-      driver: ApolloDriver,
-      playground: true,
-      autoSchemaFile: join(process.cwd(), 'src/graphql/schema.gql'),
-    }),
-    GraphqlModule,
-  ],
-  controllers: [AppController],
-  providers: [AppService, PrismaService],
+  imports: [PrismaModule, GraphqlModule],
 })
 export class AppModule {}