Core package storybook setup (#1003)

* [/][m]: add storybook to core package

* [/][s]: replace nx with nrwl packages for storybook

* [core][xs]: mv tsconfig.storybook.json to .storybook/tsconfig.json

* [/][s]: configure storybook with tailwind

* [core/tailwind.config.js][xs]: add basic Flowershow tailwind config

* [core][xs]: add example story

* [core][s]: darkmode storybook addon

packages/core/tsconfig.lib.json

@@ -17,7 +17,11 @@
     "**/*.spec.js",
     "**/*.test.js",
     "**/*.spec.jsx",
-    "**/*.test.jsx"
+    "**/*.test.jsx",
+    "**/*.stories.ts",
+    "**/*.stories.js",
+    "**/*.stories.jsx",
+    "**/*.stories.tsx"
   ],
   "include": ["**/*.js", "**/*.jsx", "**/*.ts", "**/*.tsx"]
 }