Add duplicate functionality for colors and typographies in the Assets
panel, matching the existing duplicate feature for components.
Changes:
- Add duplicate-color and duplicate-typography events in libraries
- Add Duplicate context menu option for colors
- Add Duplicate context menu option for typographies
- Update CHANGES.md
Closes#2912
Signed-off-by: mkdev11 <98430825+MkDev11@users.noreply.github.com>