Better input handling #46

🗒️ Task Description

Summary
Some inputs aren't handled correctly. Fix it.

Details
The command send with no arguments crashes the program.
There are also commands that fail but show no error.
send PLD_SET_ACTIVE_ENVS fails with no error

✅ Completion Criteria

No command can crash SOTI.
Incorrect commands give feedback to the user

🚧 Notes / Reference

Discovered in joint software/CDH meeting 22/10/2025
See meeting recording for discovery of bug.