Added device type interface startup script and sample YAML initializer

Renumber startup scripts to place platform initialization before the devices to enable platform specification during device creation

startup_scripts/240_route_targets.py

@@ -0,0 +1,29 @@
+import sys
+
+from ipam.models import RouteTarget
+from startup_script_utils import load_yaml, pop_custom_fields, set_custom_fields_values
+from tenancy.models import Tenant
+
+route_targets = load_yaml("/opt/netbox/initializers/route_targets.yml")
+
+if route_targets is None:
+    sys.exit()
+
+optional_assocs = {"tenant": (Tenant, "name")}
+
+for params in route_targets:
+    custom_field_data = pop_custom_fields(params)
+
+    for assoc, details in optional_assocs.items():
+        if assoc in params:
+            model, field = details
+            query = {field: params.pop(assoc)}
+
+            params[assoc] = model.objects.get(**query)
+
+    route_target, created = RouteTarget.objects.get_or_create(**params)
+
+    if created:
+        set_custom_fields_values(route_target, custom_field_data)
+
+        print("🎯 Created Route Target", route_target.name)