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/projman/skills/setup-workflows.md

@@ -1,6 +1,6 @@
 # Setup Workflows
 
-Shared workflows for the `/setup` command modes.
+Shared workflows for the `/pm-setup` command modes.
 
 ## Mode Detection Logic