dev : live reload avec BrowserSync + serveur PHP intégré

npm run serve démarre php -S localhost:8000 et BrowserSync en parallèle.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

browsersync.js

@@ -0,0 +1,15 @@
+const browserSync = require("browser-sync");
+const syncOptions = require("./package.json").browserSync;
+const filesToWatch = syncOptions.watch || [];
+const filesToIgnore = syncOptions.ignore || [];
+const proxy = syncOptions.proxy;
+
+const sync = browserSync.create();
+
+sync.init({
+  watch: true,
+  proxy,
+  files: filesToWatch,
+  ignore: filesToIgnore,
+  open: "local",
+});