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/bad-architecture/naming/UserDto.ts

@@ -0,0 +1,29 @@
+/**
+ * BAD EXAMPLE: DTO in Domain Layer
+ *
+ * Guardian should detect:
+ * ❌ DTO in domain layer
+ * ❌ DTOs belong in application or infrastructure
+ *
+ * Why bad:
+ * - Domain should have entities and value objects
+ * - DTOs are for external communication
+ * - Violates layer responsibilities
+ */
+
+export class UserDto {
+    constructor(
+        public id: string,
+        public email: string,
+    ) {}
+}
+
+/**
+ * ✅ GOOD VERSION:
+ *
+ * // domain/entities/User.ts - Entity in domain
+ * export class User { ... }
+ *
+ * // application/dtos/UserDto.ts - DTO in application
+ * export interface UserDto { ... }
+ */