Partially upgrade to eslint 9

- with disable rules at one place
- and ignore cypress override for now

eslint.config.js

@@ -0,0 +1,55 @@
+import globals from "globals";
+import pluginJs from "@eslint/js";
+import tseslint from "typescript-eslint";
+import pluginVue from "eslint-plugin-vue";
+
+///////////////////////////////////////////////////////////////////////////////
+//                 How to migrate this to new eslint config?                 //
+///////////////////////////////////////////////////////////////////////////////
+
+// {
+//   files: [
+//     "**/__tests__/*.{cy,spec}.{js,ts,jsx,tsx}",
+//     "cypress/e2e/**/*.{cy,spec}.{js,ts,jsx,tsx}",
+//   ],
+//   extends: ["plugin:cypress/recommended"],
+// },
+//
+// FIXME: fix this error
+// /Users/haishengwu/freizl/duyijing/src/App.vue
+//   2:10  error  'RouterLink' is defined but never used  @typescript-eslint/no-unused-vars
+//   2:22  error  'RouterView' is defined but never used  @typescript-eslint/no-unused-vars
+
+export default [
+  {
+    ignores: [
+      ".gitignore",
+      "dist/*",
+      ".vscode/*",
+      "eslint.config.js",
+      ".log/*",
+      "public/*",
+    ],
+  },
+  {
+    files: ["**/*.{js,ts,vue}"],
+  },
+  {
+    languageOptions: {
+      globals: globals.browser,
+    },
+  },
+  pluginJs.configs.recommended,
+  ...tseslint.configs.recommended,
+  ...pluginVue.configs["flat/essential"],
+  // ...pluginVue.configs["flat/strongly-recommended"],
+  // ...pluginVue.configs["flat/recommended"],
+  {
+    files: ["**/*.vue"],
+    languageOptions: {
+      parserOptions: {
+        parser: tseslint.parser,
+      },
+    },
+  },
+];