Re-name and re-factor the PDFLinkService.navigateTo method

This modernizes and improves the code, by using `async`/`await` and by extracting the helper function to its own method.
To hopefully avoid confusion, given the next patch, the method is also re-named to `goToDestination` to make is slightly clearer what it actually does.

web/interfaces.js

@@ -54,9 +54,9 @@ class IPDFLinkService {
   set externalLinkEnabled(value) {}
 
   /**
-   * @param dest - The PDF destination object.
+   * @param {string|Array} dest - The named, or explicit, PDF destination.
    */
-  navigateTo(dest) {}
+  async goToDestination(dest) {}
 
   /**
    * @param dest - The PDF destination object.