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/applications/components/SettingsApplicationAboutSidebar.tsx

@@ -3,7 +3,7 @@ import { styled } from '@linaria/react';
 import { t } from '@lingui/core/macro';
 import { type ReactNode } from 'react';
 import { isDefined } from 'twenty-shared/utils';
-import { Tag } from 'twenty-ui/components';
+import { Tag } from 'twenty-ui-deprecated/components';
 import {
   IconAlertTriangle,
   IconBrandNpm,
@@ -11,8 +11,8 @@ import {
   IconLink,
   IconMail,
   IconWorld,
-} from 'twenty-ui/display';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+} from 'twenty-ui-deprecated/display';
+import { themeCssVariables } from 'twenty-ui-deprecated/theme-constants';
 
 export type ContentEntry = {
   icon: IconComponent;

packages/twenty-front/src/modules/settings/applications/components/SettingsApplicationScreenshotGallery.tsx

@@ -1,6 +1,6 @@
 import { styled } from '@linaria/react';
 import { useState } from 'react';
-import { themeCssVariables } from 'twenty-ui/theme-constants';
+import { themeCssVariables } from 'twenty-ui-deprecated/theme-constants';
 
 type SettingsApplicationScreenshotGalleryProps = {
   screenshots: string[];