feat: allow function in default

Author: posva

src/runtime.ts

@@ -101,9 +101,7 @@ export interface DefinePageQueryParamOptions<T = unknown> {
    * (e.g. a invalid number is passed to the int param parser). If not provided
    * and the param parser throws, the route will not match.
    */
-  default?: T
-  // TODO: handle function syntax
-  // default?: (() => T) | T
+  default?: (() => T) | T
 
   /**
    * How to format the query parameter value.