[Feature] Custom db location

[the-c0d3r]

Feature: Custom db location
Description: Application should allow user to specify where to save the database, preferably through a config file. This is to allow use cases where the user want to store the database file on a shared/synced cloud drive.

Design Plan:

1. Create a file under ~/.config/dictdb/config.json
2. create new variable in the json file "db_path": "/path/to/db"

[the-c0d3r]

To make things simpler, I will just create a setup.py script which will let user specify the database location, and just symlink to the data/database.json.