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/testing/decorators/IconsProviderDecorator.tsx

@@ -1,5 +1,5 @@
 import { type Decorator } from '@storybook/react-vite';
-import { IconsProvider } from 'twenty-ui/display';
+import { IconsProvider } from 'twenty-ui-deprecated/display';
 
 export const IconsProviderDecorator: Decorator = (Story) => {
   return (

packages/twenty-front/src/testing/decorators/PageDecorator.tsx

@@ -30,7 +30,7 @@ import { WorkspaceProviderEffect } from '@/workspace/components/WorkspaceProvide
 import { i18n } from '@lingui/core';
 import { I18nProvider } from '@lingui/react';
 import { SOURCE_LOCALE } from 'twenty-shared/translations';
-import { IconsProvider } from 'twenty-ui/display';
+import { IconsProvider } from 'twenty-ui-deprecated/display';
 import { FullHeightStorybookLayout } from '~/testing/FullHeightStorybookLayout';
 import { dynamicActivate } from '~/utils/i18n/dynamicActivate';