fix(plugins): normalize author fields and versions in 4 plugin.json files

- executive-mentor: add url to author, add homepage + repository
- self-improving-agent: add url to author, version 1.0.0 → 2.1.2
- playwright-pro: fix author name (Reza → Alireza), replace email with url, version 1.0.0 → 2.1.2
- google-workspace-cli: add url to author

All plugin.json files now use consistent author object format.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

engineering-team/self-improving-agent/.claude-plugin/plugin.json

@@ -1,9 +1,10 @@
 {
   "name": "self-improving-agent",
-  "version": "1.0.0",
+  "version": "2.1.2",
   "description": "Curate auto-memory, promote learnings to CLAUDE.md and rules, extract proven patterns into reusable skills.",
   "author": {
-    "name": "Alireza Rezvani"
+    "name": "Alireza Rezvani",
+    "url": "https://alirezarezvani.com"
   },
   "repository": "https://github.com/alirezarezvani/claude-skills",
   "license": "MIT",