feat: add AODH Image Saver (Metadata), Lora Selector, Checkpoint Selector, and various node improvements

nodes/checkpoint_selector/__init__.py

@@ -0,0 +1,9 @@
+from .checkpoint_selector import CheckpointSelector
+
+NODE_CLASS_MAPPINGS = {
+    "CheckpointSelector": CheckpointSelector
+}
+
+NODE_DISPLAY_NAME_MAPPINGS = {
+    "CheckpointSelector": "Checkpoint Selector"
+}