Migrate to eslint v9 (#2486)

* build: migrate to eslint v9 and clean it up

* style: manual fixes to make new eslint happy

* style: apply eslint autofix

* build: downgrade to TypeScript 5.6 to ensure compatability with typedoc

eslint.config.mjs

@@ -0,0 +1,39 @@
+// @ts-check
+
+import eslint from '@eslint/js'
+import tseslint from 'typescript-eslint'
+
+export default tseslint.config(
+  eslint.configs.recommended,
+  tseslint.configs.recommended,
+  // Library
+  {
+    files: ['lib/**/*'],
+    rules: {
+      // Things we probably should fix at some point
+      '@typescript-eslint/ban-ts-comment': 'warn',
+      '@typescript-eslint/no-empty-object-type': 'warn',
+      '@typescript-eslint/no-explicit-any': 'warn',
+      '@typescript-eslint/no-unsafe-function-type': 'warn',
+      '@typescript-eslint/no-unused-vars': 'warn',
+      // Things we won't allow
+      '@typescript-eslint/consistent-type-imports': 'error',
+      '@typescript-eslint/no-this-alias': [
+        'error',
+        {
+          allowDestructuring: true, // Allow `const { props, state } = this`; false by default
+          allowedNames: ['self'], // Allow `const self = this`; `[]` by default
+        },
+      ],
+    },
+  },
+  // Tests
+  {
+    files: ['test/**/*'],
+    rules: {
+      '@typescript-eslint/no-unused-expressions': 'off',
+      '@typescript-eslint/no-explicit-any': 'warn',
+      '@typescript-eslint/ban-ts-comment': 'warn',
+    },
+  }
+)

lib/adapters/REST/endpoints/bulk-action.ts

@@ -1,4 +1,3 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
 import type { AxiosInstance } from 'contentful-sdk-core'
 import type { GetBulkActionParams, GetSpaceEnvironmentParams } from '../../../common-types'
 import type {

lib/adapters/REST/endpoints/release-action.ts

@@ -1,4 +1,3 @@
-/* eslint-disable @typescript-eslint/no-explicit-any */
 import type { AxiosInstance } from 'contentful-sdk-core'
 import type { GetReleaseParams, GetSpaceEnvironmentParams } from '../../../common-types'
 import type { ReleaseActionQueryOptions } from '../../../entities/release-action'

lib/common-types.ts

@@ -2105,7 +2105,7 @@ export type MRReturn<
 > = 'return' extends keyof MRActions[ET][Action] ? Promise<MRActions[ET][Action]['return']> : never
 
 /** Base interface for all Payload interfaces. Used as part of the MakeRequestOptions to simplify payload definitions. */
-// eslint-disable-next-line @typescript-eslint/no-empty-interface
+
 export interface MakeRequestPayload {}
 
 export interface MakeRequestOptions {