chore: migrate to pnpm workspaces monorepo with Turborepo

- Restructure directories: apps/api, apps/admin, apps/website
- Add root pnpm-workspace.yaml, turbo.json, .prettierrc, .gitignore
- Rename packages to @inkreach/api, @inkreach/admin, @inkreach/website
- Add shared packages: packages/tsconfig, packages/shared-types
- Add pnpm.onlyBuiltDependencies for native builds
- Update docs: README.md, structs.md
- All three projects build successfully

apps/api/src/auth/auth.controller.ts

@@ -0,0 +1,37 @@
+import { Body, Controller, HttpCode, HttpStatus, Post } from '@nestjs/common';
+import {
+  ApiOperation,
+  ApiResponse,
+  ApiTags,
+} from '@nestjs/swagger';
+import { AuthService } from './auth.service';
+import { LoginDto } from './dto/login.dto';
+import { RegisterDto } from './dto/register.dto';
+import {
+  LoginResponseDto,
+  UserPublicDto,
+} from './dto/auth-response.dto';
+
+@ApiTags('auth')
+@Controller('auth')
+export class AuthController {
+  constructor(private readonly authService: AuthService) {}
+
+  @Post('register')
+  @HttpCode(HttpStatus.CREATED)
+  @ApiOperation({ summary: 'Register a new admin user' })
+  @ApiResponse({ status: 201, type: UserPublicDto })
+  @ApiResponse({ status: 409, description: 'Username already exists' })
+  register(@Body() dto: RegisterDto): Promise<UserPublicDto> {
+    return this.authService.register(dto) as unknown as Promise<UserPublicDto>;
+  }
+
+  @Post('login')
+  @HttpCode(HttpStatus.OK)
+  @ApiOperation({ summary: 'Login and obtain a JWT' })
+  @ApiResponse({ status: 200, type: LoginResponseDto })
+  @ApiResponse({ status: 401, description: 'Invalid credentials' })
+  login(@Body() dto: LoginDto): Promise<LoginResponseDto> {
+    return this.authService.login(dto) as unknown as Promise<LoginResponseDto>;
+  }
+}