Describe the request

Compared to legacy IDE's serial monitor, it would be nice to get the "extra" baudrate like 230400, 250000, 500000, 1000000, and 2000000.

Describe the current behavior

serial-monitor does not offer the option of some useful baudrates.

Additional context

Additional requests:

• List of available baud rates in Arduino IDE serial monitor Arduino#4439
• Support 31250 baud in the Serial Monitor Arduino#3879
• Add MIDI baud to the Serial Monitor [imported] Arduino#356
• Option for serial monitor to run at 31250 baud [imported] Arduino#142