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/260_rirs.py

@@ -0,0 +1,15 @@
+import sys
+
+from ipam.models import RIR
+from startup_script_utils import load_yaml
+
+rirs = load_yaml("/opt/netbox/initializers/rirs.yml")
+
+if rirs is None:
+    sys.exit()
+
+for params in rirs:
+    rir, created = RIR.objects.get_or_create(**params)
+
+    if created:
+        print("🗺️ Created RIR", rir.name)