web ui: don't include result document within standalone bundle

[williballenthin]

please don't embed a large result document within the application bundle that is distributed to everyone:

the example data should be fetched on demand, perhaps by redirecting to a Capa Explorer Web URL that contains the callback query parameter pointing to an example.

otherwise, it will take a long time for this application to load for people with a slow internet connection.

Originally posted by @williballenthin in #2224 (comment)

[williballenthin]

by doing the redirect, then the application should also respect browser forward/back button, which has surprpised me a couple times already.