ui: table - add total number of items

[SuperITMan]

I'm submitting a...

[ ] Regression (a behavior that used to work and stopped working in a new release)
[ ] Bug report  
[X] Feature request
[ ] Documentation issue or request
[ ] Support request => Please do not submit support request here, instead see https://github.com/NationalBankBelgium/stark/blob/master/CONTRIBUTING.md#got-a-question-or-problem

Current behavior

Currently, we cannot see the total number of items we have in the Table.

Expected behavior

As we had in the previous implementation of Stark, we should display the total number of items in the Table component.

What is the motivation / use case for changing the behavior?

Align with what we had before.