Add 'packages/backend/' from commit 'acce648ee5e7e3a3006451e637c0db654820cc48'

git-subtree-dir: packages/backend
git-subtree-mainline: d0babd62af
git-subtree-split: acce648ee5

packages/backend/biome.json

@@ -0,0 +1,10 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.0.5/schema.json",
+  "formatter": {
+    "enabled": true,
+    "formatWithErrors": false,
+    "indentStyle": "space",
+    "indentWidth": 4,
+    "lineWidth": 110
+  }
+}