doc(es/types): Document outFileExtension (#10265)

**Description:**

Add type definition for `outFileExtension`

Author: withxat

bindings/binding_core_wasm/src/types.rs

@@ -1086,6 +1086,12 @@ export interface BaseModuleConfig {
    * ```
    */
   importInterop?: "swc" | "babel" | "node" | "none";
+  /**
+   * Output extension for generated files.
+   * 
+   * Defaults to `js`.
+  */
+  outFileExtension?: "js" | "mjs" | "cjs";
   /**
    * Emits `cjs-module-lexer` annotation
    * `cjs-module-lexer` is used in Node.js core for detecting the named exports available when importing a CJS module into ESM.

bindings/binding_minifier_wasm/src/types.rs

@@ -1087,6 +1087,12 @@ export interface BaseModuleConfig {
    * ```
    */
   importInterop?: "swc" | "babel" | "node" | "none";
+  /**
+   * Output extension for generated files.
+   * 
+   * Defaults to `js`.
+  */
+  outFileExtension?: "js" | "mjs" | "cjs";
   /**
    * Emits `cjs-module-lexer` annotation
    * `cjs-module-lexer` is used in Node.js core for detecting the named exports available when importing a CJS module into ESM.

packages/types/index.ts

@@ -1155,6 +1155,12 @@ export interface BaseModuleConfig {
      * ```
      */
     importInterop?: "swc" | "babel" | "node" | "none";
+    /**
+     * Output extension for generated files.
+     * 
+     * Defaults to `js`.
+     */
+    outFileExtension?: "js" | "mjs" | "cjs";
     /**
      * Emits `cjs-module-lexer` annotation
      * `cjs-module-lexer` is used in Node.js core for detecting the named exports available when importing a CJS module into ESM.