feat: add repository pattern validation (v0.5.0)

Add comprehensive Repository Pattern validation to detect violations
and ensure proper domain-infrastructure separation.

Features:
- ORM type detection in repository interfaces (25+ patterns)
- Concrete repository usage detection in use cases
- Repository instantiation detection (new Repository())
- Domain language validation for repository methods
- Smart violation reporting with fix suggestions

Tests:
- 31 new tests for repository pattern detection
- 292 total tests passing (100% pass rate)
- 96.77% statement coverage, 83.82% branch coverage

Examples:
- 8 example files (4 bad patterns, 4 good patterns)
- Demonstrates Clean Architecture and SOLID principles

packages/guardian/src/shared/constants/rules.ts

@@ -9,6 +9,7 @@ export const RULES = {
     FRAMEWORK_LEAK: "framework-leak",
     ENTITY_EXPOSURE: "entity-exposure",
     DEPENDENCY_DIRECTION: "dependency-direction",
+    REPOSITORY_PATTERN: "repository-pattern",
 } as const
 
 /**
@@ -397,4 +398,15 @@ export const FRAMEWORK_LEAK_MESSAGES = {
     DOMAIN_IMPORT:
         'Domain layer imports framework-specific package "{package}". Use interfaces and dependency injection instead.',
     SUGGESTION: "Create an interface in domain layer and implement it in infrastructure layer.",
+    PACKAGE_PLACEHOLDER: "{package}",
+} as const
+
+/**
+ * Repository pattern violation types
+ */
+export const REPOSITORY_VIOLATION_TYPES = {
+    ORM_TYPE_IN_INTERFACE: "orm-type-in-interface",
+    CONCRETE_REPOSITORY_IN_USE_CASE: "concrete-repository-in-use-case",
+    NEW_REPOSITORY_IN_USE_CASE: "new-repository-in-use-case",
+    NON_DOMAIN_METHOD_NAME: "non-domain-method-name",
 } as const