✨ Adde Biome formatter and linter

biome.jsonc

@@ -0,0 +1,57 @@
+{
+  "$schema": "https://biomejs.dev/schemas/1.9.4/schema.json",
+  "vcs": {
+    "enabled": false,
+    "clientKind": "git",
+    "useIgnoreFile": false
+  },
+  "files": {
+    "ignoreUnknown": false,
+    "ignore": ["./src/paraglide"],
+    "include": ["./src/**"]
+  },
+  "formatter": {
+    "enabled": true,
+    "indentStyle": "space"
+  },
+  "organizeImports": {
+    "enabled": true
+  },
+  "linter": {
+    "enabled": true,
+    "rules": {
+      "recommended": true
+    }
+  },
+  "javascript": {
+    "formatter": {
+      "quoteStyle": "double",
+      "semicolons": "asNeeded",
+      "arrowParentheses": "asNeeded"
+    }
+  },
+  "overrides": [
+    {
+      "include": ["*.astro"],
+      "linter": {
+        "rules": {
+          "style": {
+            "useConst": "off",
+            "useImportType": "off"
+          }
+        }
+      }
+    },
+    {
+      "include": ["*.svelte"],
+      "linter": {
+        "rules": {
+          "style": {
+            "useConst": "off",
+            "useImportType": "off"
+          }
+        }
+      }
+    }
+  ]
+}