Augment the table control's columns capabilities

[FabienLelaquais]

Description

The columns property of table can be set to a dictionary where, for every column, one can customize:

• The number or date format to apply
• The title of the column
• The index where it should appear in the table.

This issue is about considering adding support for all indexed properties of the table:

• group_by, set to the name of the aggregation function, would indicate the table would perform an aggregation on this column using this function;
• style, if set to a string, would add it as a CSS class to this column's cells;
• tooltip, if set to some text, would be the text used when the column is hover over;
• filter, if set to True, allows for filtering on this column;
• nan_value, if set to some text, would have the table use that as the representation for a 'no value' cell;
• editable, if set to True, allows for editing this column;
• lov could be set to a list of string values that are allowed for this column.
• width could be set to force the width of this column.

Setting columns[<column_name>].<property> would overwrite a potential table.<property>[<column_name>].

Note that we may also want to add the indexed title property to table... for homogeneity.

Acceptance Criteria

• Ensure new code is unit tested, and check code coverage is at least 90%.
• Propagate any change on the demos and run all of them to ensure there is no breaking change.
• Ensure any change is well documented.

Code of Conduct

• I have checked the existing issues.
• I am willing to work on this issue (optional)

[FredLL-Avaiga]

ColumnDesc interface definition is here

[pravintargaryen]

can i take this?

[jrobinAV]

@pravintargaryen Our core maintainer team has not reviewed this issue. We will let you know as soon as possible if we want to implement it.
Thank you for your understanding.