Expose totalCount in remote data feature

[damaon]

Guidelines

Please include a demo of the issue/behavior/question you have

I want to get access to totalCount with remote data feature. Currently material-table in default pagination doesn't display totalCount anywhere.

Currently it's used here only: https://github.com/mbrn/material-table/blob/b26e2f715abb2217f0d14e1efb15c6367fe12de1/src/material-table.js#L579C3-L579C16

Describe the solution you'd like

Store totalCount in tableRef.dataManager or expose something like onDataChange(data) event

Describe alternatives you've considered
Alternative is that I do fetching/pagination manually.

Additional context
People want to know how many results they have in the table. Yes it can be calculated by perPage * pages but not super accurate and little akward.

[stale]

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