[REFACTOR] Twenty UI multi barrel (#11301)

# Introduction
closes https://github.com/twentyhq/core-team-issues/issues/591
Same than for `twenty-shared` made in
https://github.com/twentyhq/twenty/pull/11083.

## TODO
- [x] Manual migrate twenty-website twenty-ui imports

## What's next:
- Generate barrel and migration script factorization within own package
+ tests
- Refactoring using preconstruct ? TimeBox
- Lint circular dependencies
- Lint import from barrel and forbid them

### Preconstruct
We need custom rollup plugins addition, but preconstruct does not expose
its rollup configuration. It might be possible to handle this using the
babel overrides. But was a big tunnel.
We could give it a try afterwards ! ( allowing cjs interop and stuff
like that )
Stuck to vite lib app

Closed related PRs:
- https://github.com/twentyhq/twenty/pull/11294
- https://github.com/twentyhq/twenty/pull/11203

packages/twenty-ui/src/assets/icons/illustration-many-to-many.svg

@@ -0,0 +1,8 @@
+<svg width="24" height="24" viewBox="0 0 24 24" fill="none" xmlns="http://www.w3.org/2000/svg">
+<path d="M3.25628 7.91194C3.22159 7.41587 3.38539 6.92633 3.71163 6.55103C4.03788 6.17573 4.49985 5.9454 4.99592 5.91071L18.0889 4.99516C18.585 4.96047 19.0746 5.12426 19.4499 5.45051C19.8252 5.77675 20.0555 6.23873 20.0902 6.7348L20.7441 16.087C20.7788 16.583 20.615 17.0726 20.2888 17.4479C19.9625 17.8232 19.5006 18.0535 19.0045 18.0882L5.91147 19.0037C5.4154 19.0384 4.92587 18.8746 4.55057 18.5484C4.17527 18.2221 3.94494 17.7602 3.91025 17.2641L3.25628 7.91194Z" fill="#E8EFFD"/>
+<path d="M14.9367 13.6737L14.6751 9.93282L17.7423 13.4775L17.4807 9.73663" fill="currentFill"/>
+<path d="M6.51971 14.2623L6.25812 10.5214L9.32536 14.0661L9.06377 10.3252" fill="currentFill"/>
+<path d="M11.9021 10.5966L11.9028 10.606L11.9021 10.5966Z" fill="#E8EFFD"/>
+<path d="M12.0983 13.4023L12.099 13.4116L12.0983 13.4023Z" fill="#E8EFFD"/>
+<path d="M14.9367 13.6737L14.6751 9.93282L17.7423 13.4775L17.4807 9.73663M6.51971 14.2623L6.25812 10.5214L9.32536 14.0661L9.06377 10.3252M11.9021 10.5966L11.9028 10.606M12.0983 13.4023L12.099 13.4116M3.25628 7.91194C3.22159 7.41587 3.38539 6.92633 3.71163 6.55103C4.03788 6.17573 4.49985 5.9454 4.99592 5.91071L18.0889 4.99516C18.585 4.96047 19.0746 5.12426 19.4499 5.45051C19.8252 5.77675 20.0555 6.23873 20.0902 6.7348L20.7441 16.087C20.7788 16.583 20.615 17.0726 20.2888 17.4479C19.9625 17.8232 19.5006 18.0535 19.0045 18.0882L5.91147 19.0037C5.4154 19.0384 4.92587 18.8746 4.55057 18.5484C4.17527 18.2221 3.94494 17.7602 3.91025 17.2641L3.25628 7.91194Z" stroke="currentColor" stroke-width="1.49625" stroke-linecap="round" stroke-linejoin="round"/>
+</svg>