Add custom nodes, Civitai loras (LFS), and vast.ai setup script

Includes 30 custom nodes committed directly, 7 Civitai-exclusive
loras stored via Git LFS, and a setup script that installs all
dependencies and downloads HuggingFace-hosted models on vast.ai.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

custom_nodes/ComfyUI-Crystools/core/keys.py

@@ -0,0 +1,29 @@
+from enum import Enum
+
+
+class TEXTS(Enum):
+    CUSTOM_NODE_NAME = "Crystools"
+    LOGGER_PREFIX = "Crystools"
+    CONCAT = "concatenated"
+    INACTIVE_MSG = "inactive"
+    INVALID_METADATA_MSG = "Invalid metadata raw"
+    FILE_NOT_FOUND = "File not found!"
+
+
+class CATEGORY(Enum):
+    TESTING = "_for_testing"
+    MAIN = "crystools 🪛"
+    PRIMITIVE = "/Primitive"
+    DEBUGGER = "/Debugger"
+    LIST = "/List"
+    SWITCH = "/Switch"
+    PIPE = "/Pipe"
+    IMAGE = "/Image"
+    UTILS = "/Utils"
+    METADATA = "/Metadata"
+
+
+# remember, all keys should be in lowercase!
+class KEYS(Enum):
+    LIST = "list_string"
+    PREFIX = "prefix"