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/saas-db-migrate/commands/db-migrate.md

@@ -1,19 +1,27 @@
 ---
 name: db-migrate
-description: Database migration toolkit — generate, validate, and manage schema migrations
+description: Database migration toolkit — type /db-migrate <action> for commands
 ---
 
 # /db-migrate
 
 Database migration management for Alembic, Prisma, and raw SQL.
 
-## Sub-commands
+When invoked without a sub-command, display available actions and ask which to run.
 
-| Sub-command | Description |
-|-------------|-------------|
+## Available Commands
+
+| Command | Description |
+|---------|-------------|
 | `/db-migrate setup` | Setup wizard for migration tool detection |
 | `/db-migrate generate` | Generate migration from model diff |
 | `/db-migrate validate` | Check migration safety |
 | `/db-migrate plan` | Show execution plan with rollback strategy |
 | `/db-migrate history` | Display migration history |
 | `/db-migrate rollback` | Generate rollback migration |
+
+## Workflow
+
+1. Display the table above
+2. Ask: "Which command would you like to run?"
+3. Route to the selected sub-command