Enhance workflow parsing and node mapper registration

- Introduced a new WorkflowParser class to streamline workflow parsing and manage node mappers.
- Added functionality to load external mappers dynamically from a specified directory.
- Refactored LoraLoaderMapper and LoraStackerMapper to handle new data formats for loras and trigger words.
- Updated recipe routes to utilize the new WorkflowParser for parsing workflows.
- Made adjustments to the flux_prompt.json to reflect changes in active states and class types.

py/workflow/ext/example_mapper.py

@@ -0,0 +1,54 @@
+"""
+Example extension mapper for demonstrating the extension system
+"""
+from typing import Dict, Any
+from ..mappers import NodeMapper
+
+class ExampleNodeMapper(NodeMapper):
+    """Example mapper for custom nodes"""
+    
+    def __init__(self):
+        super().__init__(
+            node_type="ExampleCustomNode",
+            inputs_to_track=["param1", "param2", "image"]
+        )
+    
+    def transform(self, inputs: Dict) -> Dict:
+        """Transform extracted inputs into the desired output format"""
+        result = {}
+        
+        # Extract interesting parameters
+        if "param1" in inputs:
+            result["example_param1"] = inputs["param1"]
+        
+        if "param2" in inputs:
+            result["example_param2"] = inputs["param2"]
+        
+        # You can process the data in any way needed
+        return result
+
+
+class VAEMapperExtension(NodeMapper):
+    """Extension mapper for VAE nodes"""
+    
+    def __init__(self):
+        super().__init__(
+            node_type="VAELoader",
+            inputs_to_track=["vae_name"]
+        )
+    
+    def transform(self, inputs: Dict) -> Dict:
+        """Extract VAE information"""
+        vae_name = inputs.get("vae_name", "")
+        
+        # Remove path prefix if present
+        if "/" in vae_name or "\\" in vae_name:
+            # Get just the filename without path or extension
+            vae_name = vae_name.replace("\\", "/").split("/")[-1]
+            vae_name = vae_name.split(".")[0]  # Remove extension
+            
+        return {"vae": vae_name}
+
+
+# Note: No need to register manually - extensions are automatically registered
+# when the extension system loads this file