feat(marketplace): command consolidation + 8 new plugins (v8.1.0 → v9.0.0) [BREAKING]

Phase 1b: Rename all ~94 commands across 12 plugins to /<noun> <action>
sub-command pattern. Git-flow consolidated from 8→5 commands (commit
variants absorbed into --push/--merge/--sync flags). Dispatch files,
name: frontmatter, and cross-reference updates for all plugins.

Phase 2: Design documents for 8 new plugins in docs/designs/.

Phase 3: Scaffold 8 new plugins — saas-api-platform, saas-db-migrate,
saas-react-platform, saas-test-pilot, data-seed, ops-release-manager,
ops-deploy-pipeline, debug-mcp. Each with plugin.json, commands, agents,
skills, README, and claude-md-integration. Marketplace grows from 12→20.

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

plugins/data-platform/commands/data-explain.md

@@ -1,4 +1,8 @@
-# /data-explain - dbt Model Explanation
+---
+name: data explain
+---
+
+# /data explain - dbt Model Explanation
 
 ## Skills to Load
 - skills/dbt-workflow.md
@@ -13,7 +17,7 @@ Display header: `DATA-PLATFORM - Model Explanation`
 ## Usage
 
 ```
-/data-explain <model_name>
+/data explain <model_name>
 ```
 
 ## Workflow
@@ -26,8 +30,8 @@ Display header: `DATA-PLATFORM - Model Explanation`
 ## Examples
 
 ```
-/data-explain dim_customers
-/data-explain fct_orders
+/data explain dim_customers
+/data explain fct_orders
 ```
 
 ## Required MCP Tools