Implement Encryption for Habit Export/Import

[iNikAnn]

Description

Currently, the application allows users to export their habits in a simple JSON format, which can also be imported back into the application. However, this approach does not provide any security for the exported data.

Proposed Changes

1. Encryption on Export:

   • When exporting habits, prompt the user to enter a key for encryption.
   • Encrypt the JSON data using the provided key before saving it to a file.

2. Decryption on Import:

   • When importing habits, prompt the user to enter the key used for encryption.
   • Decrypt the file using the provided key before importing the data into the application.