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/dtos/CreateUserRequest.ts

@@ -0,0 +1,13 @@
+/**
+ * Create User Request DTO
+ *
+ * Application Layer: Input DTO
+ * - Validation at system boundary
+ * - No domain logic
+ * - API contract
+ */
+export interface CreateUserRequest {
+    readonly email: string
+    readonly firstName: string
+    readonly lastName: string
+}