Rebrand MrC→2890-claw, OpenClaw→Hawk across team-facing wiki

21 files updated:
- MrC references → 2890-claw (training, hubs, recommendations, entities, fabric arch)
- OpenClaw → Hawk (entity profiles, knowledge docs)
- Removed OC artifact comments (openclaw:wiki markers)
- Preserved Fred Cullpepper namesake attribution in author fields

entities/index.md

@@ -5,7 +5,6 @@ growth: tree
 
 # 2890 Team Entities
 ## Generated
-<!-- openclaw:wiki:entities:index:start -->
 - [Alex C — Mentor Profile](entities/alex-c.md)
 - [Big Papa — Student Profile](entities/big-papa.md)
 - [Bruno — Student Profile](entities/bruno.md)
@@ -25,4 +24,3 @@ growth: tree
 - [Ryan — Student Profile](entities/ryan.md)
 - [Steven — Student Profile](entities/steven.md)
 - [Walt — Head Mentor](entities/walt.md)
-<!-- openclaw:wiki:entities:index:end -->