[data grid] Add aggregation for boolean type columns

[michelengelen]

Summary

We currently do not support aggregation for boolean type columns, although there are some use cases we should support.

Examples

1. Size
   Same as with the size aggregation for other column types: count all filled fields
2. Count true / false
   This could come in different flavors: either count all true or false values or, as an alternative, count both and show them as separate values. Very quick example:

3. some / every
   basically works as the array functions. Some/every are true or false

Motivation

This issue was raised outlining that boolean aggregation should be available. We did discuss this during a grid meeting and decided that we should allow for this. It has the added benefits that this will allow for higher customization options as well.

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