Setup the foundation for Twenty UI library. (#4423)

* feat: create a separate package for twenty-ui, extract the pill component with hard-coded theme values into it, and use the component inside twenty-front to complete the setup

* feat: extract the light and the dark theme into twenty-ui and update the AppThemeProvider component inside twenty-front to consume themes from twenty-ui

* fix: create a decorator inside preview.tsx to provide a default theme to storybook development server

* fix: remove redundant type declarations and revert back the naming convention for theme declarations

* fix: introduce a default value for pill label within the story for development server

* fix: introduce the nx script into package.json for twenty-ui and resolve imports for theme type within the package

* fix: remove the pill component from the twenty-front package along with the story for it

* fix: revert the package versions to those before running the nx cli command for storybook init

* feat: update readme to include details for building the ui library and starting the storybook development server

* fix: include details about twenty-ui inside jest.config for twenty-front to complete front-jest job

* - Added preview head for font
- Added theme addon for light/dark switch
- Added ComponentDecorator

---------

Co-authored-by: Lucas Bordeau <bordeau.lucas@gmail.com>

packages/twenty-ui/src/theme/constants/ThemeCommon.ts

@@ -0,0 +1,44 @@
+/* eslint-disable @nx/workspace-no-hardcoded-colors */
+import { ANIMATION } from './Animation';
+import { BLUR } from './Blur';
+import { COLOR } from './Colors';
+import { GRAY_SCALE } from './GrayScale';
+import { ICON } from './Icon';
+import { MODAL } from './Modal';
+import { TEXT } from './Text';
+
+export const THEME_COMMON = {
+  color: COLOR,
+  grayScale: GRAY_SCALE,
+  icon: ICON,
+  modal: MODAL,
+  text: TEXT,
+  blur: BLUR,
+  animation: ANIMATION,
+  snackBar: {
+    success: {
+      background: '#16A26B',
+      color: '#D0F8E9',
+    },
+    error: {
+      background: '#B43232',
+      color: '#FED8D8',
+    },
+    info: {
+      background: COLOR.gray80,
+      color: GRAY_SCALE.gray0,
+    },
+  },
+  spacingMultiplicator: 4,
+  spacing: (...args: number[]) =>
+    args.map((multiplicator) => `${multiplicator * 4}px`).join(' '),
+  betweenSiblingsGap: `2px`,
+  table: {
+    horizontalCellMargin: '8px',
+    checkboxColumnWidth: '32px',
+    horizontalCellPadding: '8px',
+  },
+  rightDrawerWidth: '500px',
+  clickableElementBackgroundTransition: 'background 0.1s ease',
+  lastLayerZIndex: 2147483647,
+};