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-fal-api-flux/modules/fal_api_flux_dev_node.py

@@ -0,0 +1,18 @@
+from .base_fal_api_flux_node import BaseFalAPIFluxNode
+
+class FalAPIFluxDevNode(BaseFalAPIFluxNode):
+    def __init__(self):
+        super().__init__()
+        self.set_api_endpoint("fal-ai/flux/dev")
+        
+    @classmethod
+    def INPUT_TYPES(cls):
+        return super().INPUT_TYPES()
+
+NODE_CLASS_MAPPINGS = {
+    "FalAPIFluxDevNode": FalAPIFluxDevNode
+}
+
+NODE_DISPLAY_NAME_MAPPINGS = {
+    "FalAPIFluxDevNode": "Fal API Flux Dev"
+}