Feature : Import/Export Tasks

[AndrewRoe34]

Description:

Allow users to read/write task data from .txt, .csv, .xlsx, .json to either populate their existing database or provide storage for later use.

./task import test.txt
Importing tasks from 'task.txt'...
  - 10 tasks found in the file
  - 9 tasks successfully imported
  - 1 task skipped (duplicate ID: 5)

Import complete. 9 tasks added.

./task export task.json
Exporting tasks to 'task.json'...
  - 15 tasks exported

Export complete. All tasks saved to 'task.json'.

This provides for ease of use for the user as well as easily sharing data with others.

Possible Issues:

• When reading in tasks, we'll need to take into account any possible duplicates (if a duplicate occurs, dismiss the read in task)