[Icons] Move assets/styles/live.css to assets/src/, like other packages (symfony#2935 (comment))

Author: Kocal

src/LiveComponent/assets/package.json

@@ -17,7 +17,7 @@
     "main": "dist/live_controller.js",
     "types": "dist/live_controller.d.ts",
     "config": {
-        "css_source": "styles/live.css"
+        "css_source": "src/live.css"
     },
     "scripts": {
         "build": "tsx ../../../bin/build_package.ts .",