feat(guardian): add guardian package - code quality analyzer

Add @puaros/guardian package v0.1.0 - code quality guardian for vibe coders and enterprise teams.

Features:
- Hardcode detection (magic numbers, magic strings)
- Circular dependency detection
- Naming convention enforcement (Clean Architecture)
- Architecture violation detection
- CLI tool with comprehensive reporting
- 159 tests with 80%+ coverage
- Smart suggestions for fixes
- Built for AI-assisted development

Built with Clean Architecture and DDD principles.
Works with Claude, GPT, Copilot, Cursor, and any AI coding assistant.

packages/guardian/examples/good-architecture/application/mappers/UserMapper.ts

@@ -0,0 +1,44 @@
+import { User } from "../../domain/aggregates/User"
+import { UserResponseDto } from "../dtos/UserResponseDto"
+
+/**
+ * User Mapper
+ *
+ * DDD Pattern: Mapper
+ * - Converts between domain and DTOs
+ * - Isolates domain from presentation
+ * - No business logic
+ *
+ * SOLID Principles:
+ * - SRP: only mapping
+ * - OCP: extend for new DTOs
+ *
+ * Clean Architecture:
+ * - Application layer
+ * - Protects domain integrity
+ */
+export class UserMapper {
+    /**
+     * Map domain entity to response DTO
+     */
+    public static toDto(user: User): UserResponseDto {
+        return {
+            id: user.userId.value,
+            email: user.email.value,
+            firstName: user.firstName,
+            lastName: user.lastName,
+            fullName: user.fullName,
+            isActive: user.isActive,
+            isBlocked: user.isBlocked,
+            registeredAt: user.registeredAt.toISOString(),
+            lastLoginAt: user.lastLoginAt?.toISOString(),
+        }
+    }
+
+    /**
+     * Map array of entities to DTOs
+     */
+    public static toDtoList(users: User[]): UserResponseDto[] {
+        return users.map((user) => UserMapper.toDto(user))
+    }
+}