fix(cli): support pub multiple lines on pipeline

[ysfscream]

PR Checklist

What is the current behavior?

Currently, when using the pipe mode with -s -M options in MQTTX CLI, there are several issues:

1. The command requires using two separate options (-s -M) for line-by-line input
2. The log output is too verbose, showing a message for each published line
3. The pipeline mode detection is not indicated
4. The code structure for handling stdin is not optimized

Current behavior:

❯ cat message.txt | mqttx pub -t test -s -M
✔ Connected, press Enter to publish, press Ctrl+C to exit
✖ Connection closed

Issue Number

N/A

What is the new behavior?

1. Added a new convenient option, -lm, that combines -s -M functionality
2. Optimized log output to show a summary instead of individual messages
3. Improved code structure for better maintainability

New behavior:

cat message.txt | mqttx pub -t test -s -M
✔ Connected
❯ Publishing 3 messages...
✔ Successfully published 3 messages

Does this PR introduce a breaking change?

• Yes
• No