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/tsconfig.storybook.json

@@ -0,0 +1,32 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "emitDecoratorMetadata": true,
+    "outDir": ""
+  },
+  "files": [
+    "../../node_modules/@nx/react/typings/styled-jsx.d.ts",
+    "../../node_modules/@nx/react/typings/cssmodule.d.ts",
+    "../../node_modules/@nx/react/typings/image.d.ts"
+  ],
+  "exclude": [
+    "src/**/*.spec.ts",
+    "src/**/*.test.ts",
+    "src/**/*.spec.js",
+    "src/**/*.test.js",
+    "src/**/*.spec.tsx",
+    "src/**/*.test.tsx",
+    "src/**/*.spec.jsx",
+    "src/**/*.test.js"
+  ],
+  "include": [
+    "src/**/*.stories.ts",
+    "src/**/*.stories.js",
+    "src/**/*.stories.jsx",
+    "src/**/*.stories.tsx",
+    "src/**/*.stories.mdx",
+    ".storybook/*.js",
+    ".storybook/*.ts",
+    ".storybook/main.tsx"
+  ]
+}