react-grid-layout upgrade

[uma-uc]

reference github.com/incmixlabs/react-grid-layout. Modify the repo to do the following:

• Upgrade to react 19
• Use pragmatic drag and drop
• Use radix-ui themes Grid component
• Use break points in https://www.radix-ui.com/themes/docs/theme/breakpoints for responsive views
• Publish to npm