Reorganize Catalog and label repo as tech preview #96

Job	Run time
Discover skills	11s
Validate plugin manifests	8s
Validate skill (apu-memory-tuner)	10s
Validate skill (serving-llms-on-instinct)	10s
Validate skill (rocm-doctor)	9s
Validate skill (local-ai-use)	8s
Validate skill (local-ai-app-integration)	9s
Validate skill (magpie)	15s
Validate skills and plugin manifests	5s
	1m 25s

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