Implement `racks` module

[cmeissner]

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Feature description

Since version 1.5, exists an API endpoint to read and write rack entities.

$ curl -sk -XGET -H "phpipam-token: ${PHPIPAM_TOKEN}" ${PHPIPAM_API_URL}/tools/racks/ | jq '.data[]'
{
  "id": "1",
  "name": "1_north_1_east",
  "size": "42",
  "location": null,
  "row": "1",
  "hasBack": "0",
  "topDown": "1",
  "description": null,
  "customer_id": null
}

To be complete in covering all available controllers with a separate module, we could take the opportunity to implement the rack module.

Proposed solution

The implementation needs some int, strings and two entities (location & customer_id) which need to be resolved. The logic for resolving the entities to it's IDs is already there.

Alternatives solution

No response

Additional context

No response