[Feature]: Use datasource and netbox-initializer to improve the code

[abhi1693]

NetBox version

v3.5.1

Feature type

New Model to plugin

Proposed functionality

Add a new model that provides support to connect with multiple data source. All the custom import functionality may be removed if netbox-initializers is used for import functionality.

Use case

I want to utilize the public device type library with my own private one to provide UI and API for the import.

External dependencies

• https://github.com/tobiasge/netbox-initializers

[abhi1693]

It turns out the initializer does not use standard yaml keys, so it's not possible to use it in its current form

[abhi1693]

need to figure out how we can replace github graphql API in favour of nebtox datasources