fix: parse editor command arguments for huh external editor

What does this MR do?

Fixes complex editor commands with arguments not working when pressing Ctrl+E in interactive forms.

Why was this MR needed?

Users with editor commands containing arguments (like emacsclient -t -a "emacs -nw") couldn't use the Ctrl+E functionality in interactive forms because huh's .Editor() method wasn't receiving the command and arguments as separate parameters.

What are the relevant issue numbers?

Closes #8182 (closed)

Does this MR meet the acceptance criteria?

• Tests added for this feature/bug
• Documentation created/updated
• Conforms to the code review guidelines
• Conforms to the Go guidelines