docs: migrate UI docs (#13245)

* docs: create a new UI docs project (#13233)

* docs: create a new UI docs project

* fix installation errors

* docs: migrate UI docs content to new project (#13241)

* Fix content

* added examples for some components

* finish adding examples

* lint fix

* fix build errors

* delete empty files

* path fixes + refactor

* fix build error

www/apps/ui/specs/examples/progress-tabs-disabled.tsx

@@ -0,0 +1,30 @@
+import { ProgressTabs, Text } from "@medusajs/ui"
+
+export default function ProgressTabsDisabled() {
+  return (
+    <div className="w-full px-4">
+      <ProgressTabs defaultValue="general">
+        <div className="border-b border-ui-border-base">
+          <ProgressTabs.List>
+            <ProgressTabs.Trigger value="general">General</ProgressTabs.Trigger>
+            <ProgressTabs.Trigger value="shipping" disabled>
+              Shipping
+            </ProgressTabs.Trigger>
+            <ProgressTabs.Trigger value="payment">Payment</ProgressTabs.Trigger>
+          </ProgressTabs.List>
+        </div>
+        <div className="mt-2">
+          <ProgressTabs.Content value="general">
+            <Text size="small">This is the General step.</Text>
+          </ProgressTabs.Content>
+          <ProgressTabs.Content value="shipping">
+            <Text size="small">This is the Shipping step (disabled).</Text>
+          </ProgressTabs.Content>
+          <ProgressTabs.Content value="payment">
+            <Text size="small">This is the Payment step.</Text>
+          </ProgressTabs.Content>
+        </div>
+      </ProgressTabs>
+    </div>
+  )
+}