chore: eslint perf improvements for test suite, make use of cascading for all eslint configs to minimize duplicative rule

packages/richtext-slate/.eslintrc.cjs

@@ -1,37 +1,7 @@
-/** @type {import('prettier').Config} */
+/** @type {import('eslint').Linter.Config} */
 module.exports = {
-  extends: ['@payloadcms'],
-  overrides: [
-    {
-      extends: ['plugin:@typescript-eslint/disable-type-checked'],
-      files: ['*.js', '*.cjs', '*.json', '*.md', '*.yml', '*.yaml'],
-    },
-    {
-      files: ['package.json', 'tsconfig.json'],
-      rules: {
-        'perfectionist/sort-array-includes': 'off',
-        'perfectionist/sort-astro-attributes': 'off',
-        'perfectionist/sort-classes': 'off',
-        'perfectionist/sort-enums': 'off',
-        'perfectionist/sort-exports': 'off',
-        'perfectionist/sort-imports': 'off',
-        'perfectionist/sort-interfaces': 'off',
-        'perfectionist/sort-jsx-props': 'off',
-        'perfectionist/sort-keys': 'off',
-        'perfectionist/sort-maps': 'off',
-        'perfectionist/sort-named-exports': 'off',
-        'perfectionist/sort-named-imports': 'off',
-        'perfectionist/sort-object-types': 'off',
-        'perfectionist/sort-objects': 'off',
-        'perfectionist/sort-svelte-attributes': 'off',
-        'perfectionist/sort-union-types': 'off',
-        'perfectionist/sort-vue-attributes': 'off',
-      },
-    },
-  ],
   parserOptions: {
     project: ['./tsconfig.json'],
     tsconfigRootDir: __dirname,
   },
-  root: true,
 }