feat: update plugin template to use defineConfig (#205)

* refactor: update plugin template to use `defineConfig`

* wip: update `eslint.config.mjs`

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Author: lumirlumir

plugin/templates/_README.md

@@ -21,24 +21,26 @@ npm install eslint-plugin-<%= pluginId %> --save-dev
 In your [configuration file](https://eslint.org/docs/latest/use/configure/configuration-files#configuration-file), import the plugin `eslint-plugin-<%= pluginId %>` and add `<%= pluginId %>` to the `plugins` key:
 
 ```js
+import { defineConfig } from "eslint/config";
 import <%= pluginId %> from "eslint-plugin-<%= pluginId %>";
 
-export default [
+export default defineConfig([
     {
         plugins: {
             <%= pluginId %>
         }
     }
-];
+]);
 ```
 
 <% if (hasRules) { %>
 Then configure the rules you want to use under the `rules` key.
 
 ```js
+import { defineConfig } from "eslint/config";
 import <%= pluginId %> from "eslint-plugin-<%= pluginId %>";
 
-export default [
+export default defineConfig([
     {
         plugins: {
             <%= pluginId %>
@@ -47,7 +49,7 @@ export default [
             "<%= pluginId %>/rule-name": "warn"
         }
     }
-];
+]);
 ```
 
 <% } %>

plugin/templates/_eslint.config.mjs

@@ -1,9 +1,28 @@
+import { defineConfig } from "eslint/config";
 import pluginJs from "@eslint/js";
 import pluginNode from "eslint-plugin-n";
 import eslintPlugin from "eslint-plugin-eslint-plugin";
 
-export default [
-    pluginJs.configs.recommended,
-    ...pluginNode.configs["flat/mixed-esm-and-cjs"],
-    eslintPlugin.configs["flat/recommended"]
-];
+export default defineConfig([
+    {
+        name: "eslint/js",
+        plugins: {
+            js: pluginJs,
+        },
+        extends: ["js/recommended"],
+    },
+    {
+        name: "eslint/node",
+        plugins: {
+            n: pluginNode,
+        },
+        extends: ["n/mixed-esm-and-cjs"],
+    },
+    {
+        name: "eslint/eslint-plugin",
+        plugins: {
+            "eslint-plugin": eslintPlugin,
+        },
+        extends: ["eslint-plugin/recommended"],
+    }
+]);