build(@vtmn/react): remove sourcemap and improve treeshaking

[Shyrro]

Signed-off-by: Shyrro zakaria.sahmane@decathlon.com

Changes description

Removes sourcemap to solve this issue : https://github.com/Decathlon/vitamin-web/issues/1322

Since sourcemaps are mainly for debug purposes, we're also splitting the files to improve treeshake and thus improve debugging capabilities.

Context

It solves two problems :

• Sourcemaps warnings
• Improves bundle size ( the fact that sourcemaps are gone makes the package around 200kb lighter, and the fact that it is now treeshakable also makes consumer apps lighter )

Checklist

• [x] Make sure you are requesting to pull a topic/feature/bugfix branch. Please, don't request directly from your main!
• [x] Check commits & PR names matches our requested structure. It must follow the https://www.conventionalcommits.org pattern.
• [x] Check your code additions will fail neither code linting checks.
• [x] I have reviewed the submitted code.
• [x] I have tested on related showcases.
• [x] If it includes design changes, please ask for a review design-system-core-team-design GitHub team.

Does this introduce a breaking change?

• No

[thibault-mahe]

Thanks for your quick answer @Shyrro , and thanks for this contribution! I'm merging it :)

[jdeca-decat]

@thibault-mahe @Shyrro @lauthieb Hello, thank you very much for fixing the issue #1322, I have no more warnings now :)