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/src/application/use-cases/BaseUseCase.ts

@@ -0,0 +1,13 @@
+/**
+ * Base interface for all use cases
+ */
+export interface IUseCase<TRequest, TResponse> {
+    execute(request: TRequest): Promise<TResponse>
+}
+
+/**
+ * Abstract base class for use cases
+ */
+export abstract class UseCase<TRequest, TResponse> implements IUseCase<TRequest, TResponse> {
+    public abstract execute(request: TRequest): Promise<TResponse>
+}