[2.9.2] Add screenshot documentation step to /work command

- Added step to capture before/after screenshots for UI changes
- Use Playwright MCP tools for screenshots
- Upload via 0x0.st (imgup skill)
- Updated PR template with before/after table format
- Updated quality checklist

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

plugins/compound-engineering/.claude-plugin/plugin.json

@@ -1,6 +1,6 @@
 {
   "name": "compound-engineering",
-  "version": "2.9.1",
+  "version": "2.9.2",
   "description": "AI-powered development tools. 24 agents, 19 commands, 11 skills, 2 MCP servers for code review, research, design, and workflow automation.",
   "author": {
     "name": "Kieran Klaassen",