VSN-2097/ feat(documents): implement user document management module

This MR introduces the following changes :

• Add document list screen with type filter and search
• Add document detail screen with bottom action bar (Download + Transmettre)
• Add shared_with_bo toggle to transmit documents to administration
• Show "Transmis" badge on DocumentCard when document is shared
• Improve download using expo-file-system/legacy + expo-sharing (native share sheet)
• Add native email attachment via expo-mail-composer
• Apply per-item download loading indicator in ProfileDocumentsScreen