[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-front/src/modules/spreadsheet-import/components/SpreadsheetImportTable.tsx

@@ -2,9 +2,9 @@ import { useTheme } from '@emotion/react';
 import styled from '@emotion/styled';
 // @ts-expect-error  // Todo: remove usage of react-data-grid
 import DataGrid, { DataGridProps } from 'react-data-grid';
-import { RGBA } from 'twenty-ui';
 
 import { useSpreadsheetImportInternal } from '@/spreadsheet-import/hooks/useSpreadsheetImportInternal';
+import { RGBA } from 'twenty-ui/theme';
 
 const StyledDataGrid = styled(DataGrid)`
   --rdg-background-color: ${({ theme }) => theme.background.primary};