Description

Closes #4

PrivMX Endpoint Extra

ADDITIONS

1. New Inbox File Streaming classes:
   • InboxFileStream - Base class for streaming files to Inbox.
   • InboxFileStreamReader - Implements methods that simplify the process of reading files from Inbox and writing to an OutputStream.
   • InboxFileStreamWriter - Implements methods that simplify the process of writing files to Inbox and reading from an InputStream.
2. New Inbox Entry Streaming classes:
   • InboxEntryStream - Streamlines the creation and sending of Inbox entries, supporting optional file attachments with parallel file uploads for enhanced performance.