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/viz-platform/commands/viz-theme-css.md

@@ -2,7 +2,7 @@
 description: Export a theme as CSS custom properties
 ---
 
-# Export Theme as CSS
+# Viz Theme CSS
 
 ## Skills to Load
 - skills/mcp-tools-reference.md
@@ -21,7 +21,7 @@ Export a theme's design tokens as CSS custom properties.
 ## Usage
 
 ```
-/theme-css {name}
+/viz-theme-css {name}
 ```
 
 ## Arguments
@@ -38,5 +38,5 @@ Use cases: external CSS, design handoff, documentation, other frameworks.
 
 ## Related Commands
 
-- `/theme {name}` - Apply a theme
-- `/theme-new {name}` - Create a new theme
+- `/viz-theme {name}` - Apply a theme
+- `/viz-theme-new {name}` - Create a new theme