SWC 1.1 Release : add downstate functionality in spectrum-two

[Rajdeepc]

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Context

The downstate feature in spectrum-two enhances user interaction by providing visual feedback when components are clicked or activated. It improves accessibility and user experience by clearly indicating the active state of elements. Developers can enable downstate for components, and it seamlessly integrates with existing functionality in the framework. This addition enriches the user interface, making interactions more intuitive and engaging.

RFC: https://paper.dropbox.com/doc/Controlling-javascript-andor-DOM-based-S2-changes--CLKsyM02k2gwKahuaPBiQ18SAg-V2v21xDURLM1rFpoacWTI