Modernize WordPress Playground testing infrastructure

- Update @wp-playground/cli to v3.0.22 (from deprecated v1.0.28)
- Add bin/playground-test.sh for AI assistant CLI testing
- Add bin/localwp-setup.sh for LocalWP integration
- Create .agents/local-testing-guide.md documentation
- Update blueprints to use new installPlugin step format
- Add npm scripts for playground:start/stop/status
- Add npm scripts for localwp:create/sync/reset
- Update GitHub Actions to use new CLI version
- Use PHP 8.0 and latest WordPress in blueprints

package.json

@@ -17,6 +17,14 @@
     "test:e2e:multisite": "npm run setup:multisite && sleep 5 && npm run test:multisite:headless",
     "test:playground:single": "cypress run --spec cypress/e2e/playground-single-site.cy.js",
     "test:playground:multisite": "cypress run --spec cypress/e2e/playground-multisite.cy.js",
+    "playground:start": "bash bin/playground-test.sh start",
+    "playground:start:multisite": "bash bin/playground-test.sh start --multisite",
+    "playground:stop": "bash bin/playground-test.sh stop",
+    "playground:status": "bash bin/playground-test.sh status",
+    "localwp:create": "bash bin/localwp-setup.sh create",
+    "localwp:create:multisite": "bash bin/localwp-setup.sh create --multisite",
+    "localwp:sync": "bash bin/localwp-setup.sh sync",
+    "localwp:reset": "bash bin/localwp-setup.sh reset",
     "test:phpunit": "composer test",
     "test:phpunit:multisite": "WP_MULTISITE=1 composer test",
     "build": "./build.sh",
@@ -51,9 +59,9 @@
   "homepage": "https://github.com/wpallstars/wp-plugin-starter-template-for-ai-coding#readme",
   "devDependencies": {
     "@wordpress/env": "^8.12.0",
-    "@wp-playground/blueprints": "^1.0.28",
-    "@wp-playground/client": "^1.0.28",
-    "@wp-playground/cli": "^1.0.28",
+    "@wp-playground/blueprints": "^3.0.22",
+    "@wp-playground/client": "^3.0.22",
+    "@wp-playground/cli": "^3.0.22",
     "cypress": "^13.17.0",
     "eslint": "^8.57.0",
     "eslint-plugin-cypress": "^2.15.1"