Refactor_clamd.ts

[casalsgh]

Optimized chunked data transfer: Instead of pausing and resuming the socket for each chunk, a chunkTransform function is introduced using Transform stream to handle chunked data transfer efficiently.

Simplified stream handling: The readStream is now directly piped to the chunkTransform stream and then to the socket. The end event is properly handled to ensure the socket is closed when the stream ends.

Enhanced error handling: The readStream error event is explicitly handled to reject the promise and close the socket. The socket error event is also handled to reject the promise with the encountered error.

Streamlined buffer scanning: The scanBuffer function now directly creates a readable stream from the buffer and passes it to the scanStream function, eliminating the need for maintaining the start variable.