fix: update Issue #146 CLI import path

- Fixed import path from markitect.cli.asset_commands to markitect.assets.cli_commands
- Resolves import error that prevented test collection

Note: Some integration tests may need interface adjustments as the TDD8
implementations created comprehensive mock interfaces that need alignment
with the actual asset management backend APIs.

tests/test_issue_146_final_integration.py

@@ -36,7 +36,7 @@ from markitect.assets.cache import AssetCache
 from markitect.assets.database import AssetDatabase
 from markitect.assets.performance import PerformanceMonitor
 from markitect.workspace import WorkspaceManager
-from markitect.cli.asset_commands import AssetCommands
+from markitect.assets.cli_commands import AssetCommands
 
 
 class TestFinalAssetManagementIntegration: