Ensure the desired folder exists, before writing the combined keys

[boulder225]

🎯 Problem to be solved

When the combine command is executed, it writes new combined keys to disk. However, if the target folder does not exist (which is typically the default scenario), the command results in an error.

🛠️ Proposed solution

Before writing the combined keys, the system should ensure that the desired folder exists. If it does not, the folder should be created to allow the combine command to execute without issues.

Incidence

The exact number of occurrences is unknown since we don't have logs specifically for this command. However, no users have raised complaints. This might be because the combine command is seldom used or possibly not by most of our user base.

Impact

Essentially, for the default case, the combine command is broken. This could deter new or existing users who want to utilize this functionality.