feat: Implement document management features

- Added a new DocumentsScreen for managing user documents with search and date filtering capabilities.
- Created AddDocumentModal for uploading documents with file selection and custom title options.
- Introduced SiteDocumentsScreen to display documents related to specific construction sites.
- Implemented SitesScreen for listing construction sites with search functionality.
- Updated ProfileScreen to link to the new DocumentsScreen.
- Refactored RangePickerModal for selecting date ranges in document filtering.
- Improved date formatting utilities for better timestamp handling.
- Added necessary API calls for document and site management.
- Updated types to reflect changes in document structure and site information.
- Added expo-document-picker dependency for document selection functionality.

app/(protected)/sites/_layout.tsx

@@ -0,0 +1,10 @@
+import {Stack} from 'expo-router';
+
+export default function SitesLayout() {
+  return (
+    <Stack screenOptions={{headerShown: false}}>
+      <Stack.Screen name="index" />
+      <Stack.Screen name="[id]" />
+    </Stack>
+  );
+}