feat(eslint-plugin): deprecate no-type-alias (#6229)

packages/eslint-plugin/docs/rules/no-type-alias.md

@@ -6,6 +6,20 @@ description: 'Disallow type aliases.'
 >
 > See **https://typescript-eslint.io/rules/no-type-alias** for documentation.
 
+:::danger Deprecated
+
+This rule has been deprecated in favour of the [`@typescript-eslint/consistent-type-definitions`](./consistent-type-definitions.md) rule.
+TypeScript type aliases are a commonly necessary language feature; banning it altogether is oftentimes counterproductive.
+
+:::
+
+:::note
+
+If you want to ban certain classifications of type aliases, consider using [`no-restricted-syntax`](https://eslint.org/docs/latest/rules/no-restricted-syntax).
+See [Troubleshooting & FAQs](/linting/troubleshooting#how-can-i-ban-specific-language-feature).
+
+:::
+
 In TypeScript, type aliases serve three purposes:
 
 - Aliasing other types so that we can refer to them using a simpler name.

packages/eslint-plugin/src/configs/all.ts

@@ -97,7 +97,6 @@ export = {
     '@typescript-eslint/no-this-alias': 'error',
     'no-throw-literal': 'off',
     '@typescript-eslint/no-throw-literal': 'error',
-    '@typescript-eslint/no-type-alias': 'error',
     '@typescript-eslint/no-unnecessary-boolean-literal-compare': 'error',
     '@typescript-eslint/no-unnecessary-condition': 'error',
     '@typescript-eslint/no-unnecessary-qualifier': 'error',

packages/eslint-plugin/src/rules/no-type-alias.ts

@@ -42,6 +42,7 @@ interface TypeWithLabel {
 export default util.createRule<Options, MessageIds>({
   name: 'no-type-alias',
   meta: {
+    deprecated: true,
     type: 'suggestion',
     docs: {
       description: 'Disallow type aliases',