feat: integrate framework leak detection into analysis pipeline

- Add framework leak detector to AnalyzeProject use case
- Export FrameworkLeakDetector in public API
- Add FRAMEWORK_LEAK rule constant
- Include framework leak violations in analysis response

packages/guardian/src/index.ts

@@ -10,5 +10,6 @@ export type {
     ArchitectureViolation,
     HardcodeViolation,
     CircularDependencyViolation,
+    FrameworkLeakViolation,
     ProjectMetrics,
 } from "./api"