feat: add name to flat configs (#459)

refs: eslint/eslint#18252

Author: aladdin-add

lib/index.js

@@ -74,6 +74,7 @@ Object.assign(
   Object.keys(configFilters).reduce((configs, configName) => {
     return Object.assign(configs, {
       [`flat/${configName}`]: {
+        name: `eslint-plugin/flat/${configName}`,
         plugins: { 'eslint-plugin': plugin },
         rules: Object.fromEntries(
           Object.keys(allRules)