Add cache tab

[Koc]

Add information about cache (queries, hits, misses, ms)

[vpietri]

A very tricky feature :-(

Will try

[onlinebizsoft]

Really nice idea I think - would make this one outstanding :)

[onlinebizsoft]

@vpietri @Koc I see this one have a cache tab information
https://github.com/Smile-SA/magento2-module-debug-toolbar/blob/master/Block/Zone/Cache.php