Add detailed load test results

[victor-marino]

Hey there!

Here's my PR addressing #15 to show a full report after each load test. It includes:

• Total time elapsed for the full load test
• Full table showing the result and delay of each individual query
• Minor formatting tweaks (just my personal take, feel free to modify as you see fit of course!)

Here's a screenshot showing the way it looks:

Note:
In your original summary table (which I haven't modified), the "total time" you display only takes into account successful requests. As you can see, I have added below the total end to end time taken by the full load test, as I think it's very useful.

However, since your numbers don't include the time corresponding to failed results, they don't add up with mine, which could look a bit confusing to the user.

Let me know if you'd like to modify the summary table to also show the time taken by failed requests, so things are clearer.