Have an asynchronous equivalent of Generate Summary Results with an embedded Http Server

@pmouawad ([Bug 60477](https://bz.apache.org/bugzilla//show_bug.cgi?id=60477&redirect=false)):
It would be nice to have a more visual Listener than what we currently have with Generate_Summary_Results.

Some ideas:
- Make it asynch
- Have it compute :
1) Percentiles per selected transactions
2) Min per selected transactions
3) Max per selected transactions
4) Top 5 Errors
5) Top 5 errors per selected transactions

- It should compute those an just return a JSON body
- A simple HTML+Javascript page would do the rendering
- We could embed a HTTP server

OS: All