feat(openapi-fetch): enable middleware request param module augmentation

Author: Katli95

packages/openapi-fetch/src/index.d.ts

@@ -131,18 +131,20 @@ export type MergedOptions<T = unknown> = {
   fetch: typeof globalThis.fetch;
 };
 
+export interface MiddlewareRequestParams {
+  query?: Record<string, unknown>;
+  header?: Record<string, unknown>;
+  path?: Record<string, unknown>;
+  cookie?: Record<string, unknown>;
+}
+
 export interface MiddlewareCallbackParams {
   /** Current Request object */
   request: Request;
   /** The original OpenAPI schema path (including curly braces) */
   readonly schemaPath: string;
   /** OpenAPI parameters as provided from openapi-fetch */
-  readonly params: {
-    query?: Record<string, unknown>;
-    header?: Record<string, unknown>;
-    path?: Record<string, unknown>;
-    cookie?: Record<string, unknown>;
-  };
+  readonly params: MiddlewareRequestParams;
   /** Unique ID for this request */
   readonly id: string;
   /** createClient options (read-only) */