Table row selection angular

[mollykreis]

Pull Request

🤨 Rationale

Add Angular support for row selection in the table, which is part of #856.

👩‍💻 Implementation

• Add selectionMode to the table's directive
• Add getSelectedRowIds() and setSelectedRowIds() to the table's directive
• Update the Angular example app to configure a selection mode of multiple
• Update the Angular example app to render with 0 rows in the table because there are Lighthouse failures otherwise
  • This is not an ideal solution (nor a long-term solution). However, we decided it did not make sense to block adding Angular support for row selection on Lighthouse failures, particularly when we already have an issue to track accessibility issues with the table -- Address Table accessibility issues #1151

🧪 Testing

• Added/ran unit tests
• Verified table worked correctly in example app

✅ Checklist

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