feat: Nautobot operator

[abhimanyu003]

Summary
This PR enhances the Nautobot operator so it can read Nautobot credentials from a referenced Secret and load device-type data from one or more ConfigMaps.

What this change does

• Reads the Nautobot API token (or other keys) from the Secret referenced in the custom resource.
• Loads device-type definitions from one or more ConfigMaps specified in the custom resource.
• Supports multiple device-type references.

How it works

1. Deploy the operator to the cluster.
2. Create a Nautobot custom resource (example YAML below).
3. The operator reads the referenced Secret and ConfigMap and sync the device-type data.

---

Usage example

apiVersion: sync.rax.io/v1alpha1
kind: Nautobot
metadata:
  name: nautobot-sample
spec:
  deviceTypeRef:
    - configMapSelector:
        name: device-types
        namespace: nautobot
      name: device-types
  nautobotSecretRef:
    key: NAUTOBOT_SUPERUSER_API_TOKEN
    name: nautobot-env
    namespace: default
  syncIntervalSeconds: 5

PS

• You can provide multiple deviceTypeRef entries to load device types from several ConfigMaps.
• If needed, update the ConfigMap and Secret references in the custom resource to point to the correct resources in your cluster.

Rough Diagram