[Feat] Develop ansible module for categories

[bhati-pradeep]

Requirements:

• [x] Categories CRUD module
• [x] Categories info

Todo:

• [x] Client SDK, get_spec()
• [x] Ansible spec & spec validator
• [x] Unit test, sanity test
• [x] Integration test
• [x] Documentation
• [x] Examples

[bhati-pradeep]

This module can be used for operations on both category key and category values.