Add support for text output

[rhamzeh]

We'd like to support a text output, it should be the default and if --output=json is passed, we'd toggle to JSON.

The responses should be:

• Create Store: Store <ID> successfully created.
• List Stores:

id, name, created_at, updated_at
<store_id>, <store_name>, <created_at>, <updated_at>

• Get Store:

id : <store_id>,
name: <store_name>,
created_at: <created_at>,
updated_at: <updated_at>,
deleted_at: <deleted_at>

• Delete Store: Store <ID> successfully deleted.

• List Models:

// Model ID : <ID>, // Model : <JSON>

• Write Model

Model <ID> successfully created.
Model: <JSON>

• Get Model

<JSON>

• Write: Tuple successfully added
• Delete: Tuple successfully deleted
• Read:

user, relation, object, date created
<user>, <relation>, <object>, <timestamp>

• Read Changes:

Tuple <tuple in tuple format> ADDED at <timestamp>.

• Check: Allowed : True | False
• List Objects:

<object_type>:<object_id>
<object_type>:<object_id>
<object_type>:<object_id>
<object_type>:<object_id>

• List Relations:

relation1
relation2