<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Introduced file visibility options for uploaded files, allowing users
to set files as public or private.
- Added a new API endpoint for retrieving temporary URLs for files,
enhancing file accessibility.
- Expanded file upload documentation to include information on file
visibility settings.
- Updated URL validation to support URLs with port numbers and
"http://localhost".
- **Enhancements**
- Improved media download functionality by replacing the `got` library
with a custom `downloadMedia` function.
- Enhanced bot flow continuation and session start logic to support a
wider range of reply types, including WhatsApp media messages.
- **Bug Fixes**
- Adjusted file path and URL construction in the `generateUploadUrl`
function to correctly reflect file visibility settings.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
