Move column sorting properties to a column mixin

[mollykreis]

Pull Request

🤨 Rationale

Currently, there is no way for a table column to not support sorting because the sorting attributes (sorting-disabled, sort-index, and sort-direction) are defined on the base TableColumn class. The menu button column, however, should not allow sorting. Therefore, the three sorting attributes are being moved off of the base TableColumn class and into a mixin, that every existing column now uses.

👩‍💻 Implementation

nimble-components

• Create mixin for sortable columns
• Remove sorting properties from the base TableColumn class
• Add sortingDisabled to column internals

nimble-angular

• Remove sorting properties from the base column directive and into each column type directive
• Add support for sortingDisabled (including tests) on all columns since this hadn't been exposed through Angular

nimble-blazor

• Create ISortableColumn interface
• Move sorting properties from the base column component and into ISortableColumn
• Update all columns to implement ISortableColumn
• Add support for SortingDisabled since this hadn't been exposed through Blazor
• Update tests for sortable columns
• Update tests for base columns since it previously was only testing sorting properties. I've removed those and added tests for missing base properties of ColumnId, ActionMenuSlot, ActionMenuLabel, and ColumnHidden.

🧪 Testing

• Unit tests

✅ Checklist

• [ ] I have updated the project documentation to reflect my changes or determined no changes are needed.

[mollykreis]

@m-akinc, will you buddy this PR for me?

[rajsite]

Gonna override merge since it's pretty mechanical and following existing patterns. If concerns @jattasNI @atmgrifter00 @msmithNI I'm sure we can address in a follow-up