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/pr-review/commands/pr-summary.md

@@ -1,4 +1,10 @@
-# /pr-summary - Quick PR Summary
+---
+name: pr summary
+description: Quick summary of PR changes
+agent: coordinator
+---
+
+# /pr summary - Quick PR Summary
 
 ## Visual Output
 
@@ -13,7 +19,7 @@ Display header: `PR-REVIEW - Quick Summary`
 ## Usage
 
 ```
-/pr-summary <pr-number> [--repo owner/repo]
+/pr summary <pr-number> [--repo owner/repo]
 ```
 
 ## Workflow
@@ -38,4 +44,4 @@ Use summary format from `skills/output-formats.md`
 
 - Quick overview before full review
 - Triage multiple PRs
-- Decide if /pr-review is needed
+- Decide if `/pr review` is needed