refactor(setup): consolidate prettier config and streamline CI

- Replace scattered .prettierignore files with a single root config
- Add scripts/ci.js to orchestrate lint, format, typecheck, commitlint, and build
- Simplify ci.yml to use ci.js and npm ci
- Apply prettier formatting to docs, locales, and HTML files

packages/extension/public/_locales/en/messages.json

@@ -1,11 +1,11 @@
 {
-	"extName": {
-		"message": "Page Agent Ext"
-	},
-	"extDescription": {
-		"message": "AI-powered browser automation assistant. Control web pages with natural language."
-	},
-	"extActionTitle": {
-		"message": "Open Page Agent"
-	}
+    "extName": {
+        "message": "Page Agent Ext"
+    },
+    "extDescription": {
+        "message": "AI-powered browser automation assistant. Control web pages with natural language."
+    },
+    "extActionTitle": {
+        "message": "Open Page Agent"
+    }
 }