feat(commands): make dispatch files active command handlers

All 25 dispatch files now have name: in frontmatter with Workflow
section that displays sub-commands and prompts for selection.
Bare /noun invocation is now useful instead of a dead end.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

plugins/contract-validator/commands/cv.md

@@ -1,14 +1,16 @@
 ---
-description: Cross-plugin compatibility validation
+name: cv
+description: Cross-plugin compatibility validation — type /cv <action> for commands
 ---
 
 # /cv
 
 Cross-plugin compatibility validation and agent verification.
+When invoked without a sub-command, display available actions and ask which to run.
 
-## Sub-commands
+## Available Commands
 
-| Sub-command | Description |
+| Command | Description |
 |-------------|-------------|
 | `/cv validate` | Full marketplace compatibility validation |
 | `/cv check-agent` | Validate single agent definition |
@@ -16,3 +18,9 @@ Cross-plugin compatibility validation and agent verification.
 | `/cv dependency-graph` | Mermaid visualization of plugin dependencies |
 | `/cv setup` | Setup wizard for contract-validator MCP |
 | `/cv status` | Marketplace-wide health check |
+
+## Workflow
+
+1. Display the table above
+2. Ask: "Which command would you like to run?"
+3. Route to the selected sub-command