Interactive Error Handling

[cbzehner]

Hi, I just found mn and it looks quite useful, thanks for creating this and sharing it!

One papercut I ran across in using it was creating my initial data. I'm unable to edit something before I add it, and although the message sounds like it will be interactive, it actually just exits with an error code.

❯ mn edit notes
notes not found.  Would you like to add it to Mnemonic?
❯ ...

Would you be interested in a Pull Request to make this experience interactive?

1. Prompt the user [y/n]
2. The "no" case would exit without an error code
3. The "yes" case would potentially
   a. Run the add command
   b. Run the edit command