Use Vite plugin type and return minimal version (#2672)

Ths change uses the Vite plugin type to annotate the Rollup plugin
internally. This means that we get full type checking support for the
implementation. However, the return type is annotated as our very
minimal plugin type. This way it’s compatible with Rollup, Vite, and
Rolldown, but we don’t need a dependency on Rollup.

`@rollup/pluginutils` has an optional peer dependency on `rollup`, but
it’s not actually used. So it can be removed now.

Closes #2671

Author: remcohaszing

package-lock.json

@@ -2,7 +2,7 @@
  * @import {FormatAwareProcessors} from '@mdx-js/mdx/internal-create-format-aware-processors'
  * @import {CompileOptions} from '@mdx-js/mdx'
  * @import {FilterPattern} from '@rollup/pluginutils'
- * @import {SourceDescription} from 'rollup'
+ * @import * as vite from 'vite'
  */
 
 /**
@@ -23,33 +23,6 @@
  *   Plugin that is compatible with both Rollup and Vite.
  * @property {string} name
  *   The name of the plugin
- * @property {ViteConfig} config
- *   Function used by Vite to set additional configuration options.
- * @property {Transform} transform
- *   Function to transform the source content.
- *
- * @callback Transform
- *   Callback called by Rollup and Vite to transform.
- * @param {string} value
- *   File contents.
- * @param {string} id
- *   Module ID.
- * @returns {Promise<SourceDescription | undefined>}
- *   Result.
- *
- * @callback ViteConfig
- *   Callback called by Vite to set additional configuration options.
- * @param {unknown} config
- *   Configuration object (unused).
- * @param {ViteEnv} env
- *   Environment variables.
- * @returns {undefined}
- *   Nothing.
- *
- * @typedef ViteEnv
- *   Environment variables used by Vite.
- * @property {string} mode
- *   Mode.
  */
 
 import {createFormatAwareProcessors} from '@mdx-js/mdx/internal-create-format-aware-processors'
@@ -71,7 +44,8 @@ export function rollup(options) {
   let formatAwareProcessors
   const filter = createFilter(include, exclude)
 
-  return {
+  /** @type {vite.Plugin<unknown>} */
+  const plugin = {
     name: '@mdx-js/rollup',
     config(config, env) {
       formatAwareProcessors = createFormatAwareProcessors({
@@ -102,4 +76,6 @@ export function rollup(options) {
       }
     }
   }
+
+  return plugin
 }

packages/rollup/lib/index.js

@@ -63,10 +63,6 @@
     "source-map": "^0.7.0",
     "vfile": "^6.0.0"
   },
-  "peerDependencies": {
-    "rollup": ">=2"
-  },
-  "devDependencies": {},
   "scripts": {
     "test": "npm run test-coverage",
     "test-api": "node --conditions development test/index.js",