fmt: use biome

frontend/biome.json

@@ -0,0 +1,41 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.3.6/schema.json",
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true
+  },
+  "files": {
+    "includes": ["**", "!!**/dist"]
+  },
+  "formatter": {
+    "enabled": true,
+    "formatWithErrors": true,
+    "attributePosition": "auto",
+    "indentStyle": "space",
+    "indentWidth": 2,
+    "lineWidth": 110,
+    "lineEnding": "lf"
+  },
+  "javascript": {
+    "formatter": {
+      "arrowParentheses": "always",
+      "bracketSameLine": false,
+      "bracketSpacing": true,
+      "jsxQuoteStyle": "double",
+      "quoteProperties": "asNeeded",
+      "semicolons": "always",
+      "trailingCommas": "all"
+    }
+  },
+  "json": {
+    "formatter": {
+      "trailingCommas": "none"
+    }
+  },
+  "css": {
+    "parser": {
+      "tailwindDirectives": true
+    }
+  }
+}