fix/update paths to remove local dev errors

[MCesarczyk]

Fixes: #624

• updated stylesheet paths in all examples

• fixed global React import issue

• fixed @luma.gl constants file issue

[charlieforward9]

Ive always had issues with stylesheets in this repo - @ibgreen has made comments that make it seem like the existing pattern works for him, so his review here would be valuable.

[charlieforward9]

I did a quick local repro against current master. The PR merges cleanly, and the test-node failure looks like CI comment permissions rather than failing tests. The website-build failure is real though: @deck.gl/widgets/dist/stylesheet.css is not exported by @deck.gl/widgets, while @deck.gl/widgets/stylesheet.css is the public exported CSS path.

Proposition: keep the example imports on the public path:

import '@deck.gl/widgets/stylesheet.css';

and fix the local-dev resolution issue in examples/vite.config.local.mjs with a targeted alias for @deck.gl/widgets/stylesheet.css, similar to the luma constants workaround. That keeps source examples aligned with package exports while still handling the local Vite alias behavior that appears to be causing #624.

The tsconfig JSX runtime change and the luma constants alias may still be valid, but they seem separable from the stylesheet path issue.