add overview readme to link all the documentation

sde_collections/models/README.md

@@ -0,0 +1,15 @@
+# COSMOS Curation System
+
+A system for managing collections of URLs through pattern-based rules and status workflows.
+
+## Documentation
+
+
+- [URL Pattern Overview](./README_PATTERN_OVERVIEW.md) - Core pattern system for URL filtering and modification
+    - [Pattern System Details](./README_PATTERN_SYSTEM.md)
+    - [URL Lifecycle Management](./README_LIFECYCLE.md)
+    - [Pattern Resolution](./README_PATTERN_RESOLUTION.md)
+    - [URL Inclusion/Exclusion](./README_INCLUSION.md)
+    - [Pattern Unapplication Logic](./README_UNAPPLY_LOGIC.md)
+- [Collection Status Workflows](./README_STATUS_TRIGGERS.md) - Collection progression and automated triggers
+- [Reindexing Status System](./README_REINDEXING_STATUSES.md) - Status management for reindexing collections