fix(cli): raise error for unrecognized root flags like --group

[panther-0707]

Description

Fixes #206

Previously, passing an unknown flag such as --group before a
subcommand would silently break out of the argument parsing loop
in extract_root_config(). This caused Sugar to fall back to
environment variable defaults, affecting unintended containers
with no warning shown to the user.

Changes

• Added a check in extract_root_config() for unrecognized flags
  starting with --
• Shows a clear error message suggesting --profile as the correct
  parameter
• Exits with code 1 immediately

How to Test

sugar --group dev compose down
# Expected: Error: '--group' is not a valid parameter. 
# Did you mean '--profile'?

Pull Request checklist

• bug-fix
• new feature
• maintenance

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