refactor: update internal command references in all plugin files

Updated:
- projman: 4 commands + 4 skills + integration snippet
- git-flow: 4 commands + 3 skills + integration snippet
- pr-review: 1 command cross-reference
- cmdb-assistant: 1 command + 1 skill
- data-platform: 8 commands + integration snippet
- viz-platform: 11 commands + integration snippet
- contract-validator: 1 command + 1 skill + 1 agent

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

plugins/contract-validator/skills/mcp-tools-reference.md

@@ -65,6 +65,6 @@ Available MCP tools for contract-validator operations.
 ## Error Handling
 
 If MCP tools fail:
-1. Check if `/initial-setup` has been run
+1. Check if `/cv-setup` has been run
 2. Verify session was restarted after setup
 3. Check MCP server venv exists and is valid