Update public API syntax of remote (lazy) widgets

[christian-byrne]

Updates the public API syntax of nodes with remote inputs. The type property already exists on BaseInputSpec, causing remote widget's type to be shadowed when transformed to ComfyNodeDefImpl, potentially causing issues in the future.

No custom nodes use this feature yet (code source query).

class RemoteWidgetNode:
    @classmethod
    def INPUT_TYPES(cls):
        return {
            "required": {
                "remote_widget_value": (
                    "COMBO",
                    {
-                        "type": "remote",
-                        "route": "/api/models/checkpoints",
-                        "refresh": 1000,
+                        "remote": {
+                            "route": "/api/models/checkpoints",
+                            "refresh": 1000,
+                        },
                    },
                ),
            },
        }

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