fix: manage inp tbl contextmenu as custom event

[zammarchi-smeup]

This pull request adds support for a new custom event, kup-inputpanel-datatable-contextmenu, to the kup-input-panel component, enabling consumers to handle context menu actions specifically triggered from the embedded kup-data-table. The implementation includes updates to both the Stencil component and its React wrapper, as well as documentation.

Event Handling Enhancements:

• Added a new event emitter kupInputPanelDataTableContextMenu to the kup-input-panel Stencil component, which emits KupDatatableClickEventPayload when a context menu action is triggered in the internal data table. [1] [2]
• Removed the old interactable event handler logic for context menu detection, streamlining how context menu events are handled within the component. [1] [2]

React Wrapper Updates:

• Updated the KupInputPanelEvents type and event mapping in the React wrapper to support the new onKupInputpanelDatatableContextmenu event. [1] [2]

Documentation:

• Added documentation for the new kup-inputpanel-datatable-contextmenu event to the component's README.