linter/formatter を eslint + prettier から biome に統一

AdditionalToolbarButton/README.md

@@ -15,11 +15,8 @@ This is a template for creating an additional toolbar button for metatell.
 - `npm run preview`: Preview the production build locally
 - `npm run lint`: Run all lint check
 - `npm run lint:tsc`: Run code check based on tsc
-- `npm run lint:prettier`: Run code check based on prettier
-- `npm run lint:eslint`: Run code check based on eslint
-- `npm run lint-fix`: Run all code fix
-- `npm run lint-fix:prettier`: Run code fix based on prettier
-- `npm run lint-fix:eslint`: Run code fix based on eslint
+- `npm run lint:biome`: Run code check based on biome
+- `npm run lint-fix`: Run code fix based on biome
 
 ## How to develop
 

AdditionalToolbarButton/biome.json

@@ -0,0 +1,23 @@
+{
+  "$schema": "https://biomejs.dev/schemas/2.3.13/schema.json",
+  "linter": {
+    "rules": {
+      "recommended": true,
+      "a11y": {
+        "noLabelWithoutControl": "warn",
+        "noRedundantAlt": "warn",
+        "noStaticElementInteractions": "warn",
+        "noSvgWithoutTitle": "warn",
+        "useAltText": "warn",
+        "useIframeTitle": "warn",
+        "useKeyWithClickEvents": "warn"
+      },
+      "correctness": {
+        "useExhaustiveDependencies": "warn"
+      },
+      "suspicious": {
+        "noArrayIndexKey": "warn"
+      }
+    }
+  }
+}