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/postcss.config.js

@@ -0,0 +1,11 @@
+// libs/shared/ui/postcss.config.js
+const { join } = require('path');
+
+module.exports = {
+  plugins: {
+    tailwindcss: {
+      config: join(__dirname, 'tailwind.config.js'),
+    },
+    autoprefixer: {},
+  },
+};