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/ui/layout/fullscreen/components/FullScreenContainer.tsx

@@ -5,8 +5,8 @@ import {
   type BreadcrumbProps,
 } from '@/ui/navigation/bread-crumb/components/Breadcrumb';
 import { styled } from '@linaria/react';
-import { useIsMobile } from 'twenty-ui/utilities';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { useIsMobile } from 'twenty-ui-deprecated/utilities';
+import { themeCssVariables } from 'twenty-ui-deprecated/theme-constants';
 
 type FullScreenContainerProps = {
   children: JSX.Element | JSX.Element[];

packages/twenty-front/src/modules/ui/layout/fullscreen/components/FullScreenModal.tsx

@@ -6,7 +6,7 @@ import {
 } from '@/ui/navigation/bread-crumb/components/Breadcrumb';
 import { styled } from '@linaria/react';
 import { forwardRef } from 'react';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { themeCssVariables } from 'twenty-ui-deprecated/theme-constants';
 
 const StyledFullScreenOverlay = styled.div`
   background: ${themeCssVariables.background.noisy};

packages/twenty-front/src/modules/ui/layout/fullscreen/components/__stories__/FullScreenContainer.stories.tsx

@@ -4,7 +4,7 @@ import { type Meta, type StoryObj } from '@storybook/react-vite';
 import {
   ComponentDecorator,
   ComponentWithRouterDecorator,
-} from 'twenty-ui/testing';
+} from 'twenty-ui-deprecated/testing';
 
 const meta: Meta<typeof FullScreenContainer> = {
   title: 'UI/Layout/FullScreenContainer',