'gossh vault encrypt' get plaintext that to be encrypted from prompt

[nlcwyggyxdr]

Hi, thanks for your excellent work. Currently command gossh vault encrypt only obtains the plaintext to be encrypted from the argument. For security reasons, can you consider adding the feature of obtaining plaintext from promt?

For example:

$ gossh vault encrypt -V ./vault-pass.txt
Plaintext:
Confirm plaintext:

[windvalley]

Thank you for your suggestion, it sounds like a good proposal. I will add this feature in the next minor version.

[nlcwyggyxdr]

@windvalley Awesome, thanks!