Rename twenty-ui to twenty-ui-deprecated and twenty-new-ui to twenty-ui to prepare package release (#21315)

## Description

Promotes the next-gen UI library (formerly `twenty-new-ui`) to the name
**`twenty-ui`** (v0.1.0, publishable) and renames the old package to
**`twenty-ui-deprecated`**. Rewrites ~1,730 `twenty-ui` imports →
`twenty-ui-deprecated`, updates all configs/CI/Docker/deps, and migrates
twenty-front's `Toggle` to the new package (first consumer) as a
drop-in.

## Next steps
- Wire the `ui/v*` publish dispatch (`cd-deploy-tag.yaml` +
`.yarnrc.yml`), then tag `ui/v0.1.0` to publish.
- Continue migrating components from `twenty-ui-deprecated` →
`twenty-ui`.

packages/twenty-front/src/modules/settings/data-model/components/SettingsDataModelCardTitle.tsx

@@ -1,5 +1,5 @@
 import { styled } from '@linaria/react';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { themeCssVariables } from 'twenty-ui-deprecated/theme-constants';
 
 const StyledTitle = styled.h3`
   color: ${themeCssVariables.font.color.extraLight};

packages/twenty-front/src/modules/settings/data-model/components/SettingsDataModelNewFieldBreadcrumbDropDown.tsx

@@ -9,10 +9,13 @@ import { useContext } from 'react';
 import { useLocation, useParams, useSearchParams } from 'react-router-dom';
 import { SettingsPath } from 'twenty-shared/types';
 import { isDefined } from 'twenty-shared/utils';
-import { IconChevronDown } from 'twenty-ui/display';
-import { Button } from 'twenty-ui/input';
-import { MenuItem } from 'twenty-ui/navigation';
-import { ThemeContext, themeCssVariables } from 'twenty-ui/theme-constants';
+import { IconChevronDown } from 'twenty-ui-deprecated/display';
+import { Button } from 'twenty-ui-deprecated/input';
+import { MenuItem } from 'twenty-ui-deprecated/navigation';
+import {
+  ThemeContext,
+  themeCssVariables,
+} from 'twenty-ui-deprecated/theme-constants';
 import { useNavigateSettings } from '~/hooks/useNavigateSettings';
 
 const StyledContainer = styled.div`

packages/twenty-front/src/modules/settings/data-model/components/SettingsDataModelPreviewFormCard.tsx

@@ -3,9 +3,9 @@ import { type ReactNode } from 'react';
 
 import { StyledFormCardTitle } from '@/settings/data-model/fields/components/StyledFormCardTitle';
 import { Trans } from '@lingui/react/macro';
-import { Card, CardContent } from 'twenty-ui/layout';
+import { Card, CardContent } from 'twenty-ui-deprecated/layout';
 import { isDefined } from 'twenty-shared/utils';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { themeCssVariables } from 'twenty-ui-deprecated/theme-constants';
 
 type SettingsDataModelPreviewFormCardProps = {
   className?: string;