Add biome for js lint and formatting.

biome.json

@@ -0,0 +1,41 @@
+{
+  "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
+  "vcs": {
+    "enabled": true,
+    "clientKind": "git",
+    "useIgnoreFile": true,
+    "defaultBranch": "main"
+  },
+  "files": {
+    "ignoreUnknown": true,
+    "include": ["assets/**/*.js"],
+    "ignore": ["**/*.min.js", "assets/libs/**/*.js"]
+
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space"
+  },
+  "organizeImports": {
+    "enabled": true
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true,
+      "complexity": {
+        "noForEach": "off",
+        "useArrowFunction": "off"
+      },
+      "style": {
+        "useTemplate": "off"
+      }
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "single"
+    },
+    "globals": ["define", "htmx", "jQuery", "Alpine"]
+  }
+}