Email: Generate email with pie charts similar as dashboard

As a user I want to generate email similar as robotframework-metrics dashboard like 
```
    Suite   Total   Pass  Fail
    Test    Total   Pass  Fail
    Kw      Total   Pass  Fail
 
   Pie charts
   Suite   Test   KW
```

So that I can share my email with supervisor

Note: I dont want to include top 10 perfromance stats in execution status email
