fix: update package.json to set private flag and add keywords

Author: medyll

package.json

@@ -3,6 +3,7 @@
   "version": "0.1.0",
   "description": "",
   "main": "index.js",
+  "private": false,
   "scripts": {
     "test": "echo \"Error: no test specified\" && exit 1"
   },
@@ -13,7 +14,7 @@
     "./utilities": "./dist/utilities.css",
     "./workspace": "./dist/workspace.css"
   },
-  "keywords": [],
+  "keywords": ["css", "base", "theme", "css-utilities"],
   "author": "Lebrun Meddy",
   "license": "ISC",
   "packageManager": "pnpm@10.28.0",