chore(2025): add eslint

Author: ryoppippi

2025/.gitignore

@@ -22,3 +22,5 @@ pnpm-debug.log*
 
 # jetbrains setting folder
 .idea/
+
+.eslintcache

2025/.npmrc

@@ -0,0 +1 @@
+@jsr:registry=https://npm.jsr.io

2025/eslint.config.mjs

@@ -0,0 +1,10 @@
+import { ryoppippi } from "@ryoppippi/eslint-config";
+
+export default ryoppippi({
+  type: 'app', // or 'lib'
+  svelte: false,
+  astro: true,
+  typescript: {
+    tsconfigPath: "./tsconfig.json",
+  },
+});

2025/package.json

@@ -7,7 +7,9 @@
     "dev": "astro dev",
     "build": "astro build",
     "preview": "astro preview",
-    "astro": "astro"
+    "astro": "astro",
+    "lint": "eslint --cache .",
+    "format": "nr lint --fix"
   },
   "dependencies": {
     "@astrojs/react": "^4.2.0",
@@ -22,7 +24,12 @@
     "ufo": "^1.5.4"
   },
   "devDependencies": {
+    "@antfu/ni": "^23.3.1",
     "@astrojs/ts-plugin": "^1.10.4",
+    "@ryoppippi/eslint-config": "npm:@jsr/ryoppippi__eslint-config@^0.0.25",
+    "eslint": "^9.20.1",
+    "eslint-plugin-astro": "^1.3.1",
+    "eslint-plugin-format": "^1.0.1",
     "sharp": "^0.33.5",
     "typescript": "^5.7.3",
     "unplugin-macros": "^0.16.0"