[refactor,#59][s]: move packages/portal => examples/catalog as per plan in #59.

What is currently packages/portal is example of a running portal and should move to examples (it will get replaced by an actual portal lib soon).

examples/catalog/tailwind.config.js

@@ -0,0 +1,30 @@
+module.exports = {
+  theme: {
+    fontSize: {
+      tiny: 'var(--font-size-small)',
+      md: 'var(--font-size-medium)',
+      lg: 'var(--font-size-large)',
+    },
+    extend: {
+      colors: {
+        primary: 'var(--color-primary)',
+        secondary: 'var(--color-secondary)',
+        negative: 'var(--color-negative)',
+        positive: 'var(--color-positive)',
+        'primary-background': 'var(--background-primary)',
+        'sec-background': 'var(--background-sec)',
+        'primary-text': 'var(--color-text-primary)',
+      },
+    },
+    backgroundColor: (theme) => ({
+      ...theme('colors'),
+    }),
+  },
+  variants: {
+    backgroundColor: ['active'],
+  },
+  plugins: ['font-size'],
+  corePlugins: {
+    fontSize: true,
+  },
+};