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

nodes/character_reader/characters/kagamine_rin.json

@@ -0,0 +1,35 @@
+{
+  "character_id": "kagamine_rin",
+  "identity": {
+    "base_specs": "1girl, petite",
+    "hair": "blonde hair, short hair, hair bow",
+    "eyes": "blue eyes",
+    "expression": "smile, energetic",
+    "hands": "",
+    "arms": "detached sleeves",
+    "torso": "flat chest",
+    "pelvis": "",
+    "legs": "leg warmers",
+    "feet": "",
+    "distinguishing_marks": ""
+  },
+  "wardrobe": {
+    "inner_layer": "white shirt, sailor collar",
+    "outer_layer": "",
+    "lower_body": "black shorts, yellow belt",
+    "footwear": "white shoes",
+    "gloves": "",
+    "accessories": "headset, hair bow"
+  },
+  "styles": {
+    "aesthetic": "vocaloid, cyber",
+    "primary_color": "yellow",
+    "secondary_color": "white",
+    "tertiary_color": "black"
+  },
+  "lora": {
+    "lora_name": "",
+    "lora_weight": 1.0,
+    "lora_triggers": ""
+  }
+}