docs: add composition section

apps/v4/content/docs/components/base/progress.mdx

@@ -62,6 +62,33 @@ import { Progress } from "@/components/ui/progress"
 <Progress value={33} />
 ```
 
+## Composition
+
+### With label and value
+
+Use `ProgressLabel` and `ProgressValue` to add a label and value display.
+
+```tsx showLineNumbers
+import {
+  Progress,
+  ProgressLabel,
+  ProgressValue,
+} from "@/components/ui/progress"
+
+<Progress value={56} className="w-full max-w-sm">
+  <ProgressLabel>Upload progress</ProgressLabel>
+  <ProgressValue />
+</Progress>
+```
+
+```text
+Progress
+├── ProgressLabel
+├── ProgressValue
+└── ProgressTrack
+    └── ProgressIndicator
+```
+
 ## Examples
 
 ### Label