refactor nodes into standalone file

backend/nodes/print_table.py

@@ -0,0 +1,27 @@
+from __future__ import annotations
+from backend.node_registry import register_node
+
+
+@register_node(display_name="Print Table")
+class PrintTable:
+    @classmethod
+    def INPUT_TYPES(cls):
+        return {
+            "required": {
+                "table": ("ANY_TABLE",),
+            }
+        }
+
+    RETURN_TYPES = ()
+    FUNCTION = "print_table"
+
+    OUTPUT_NODE = True
+    DESCRIPTION = "Send a measurement or record table to the browser as a WebSocket message for display."
+
+    _broadcast_table_fn = None
+    _current_node_id: str = ""
+
+    def print_table(self, table: list) -> tuple:
+        if PrintTable._broadcast_table_fn is not None:
+            PrintTable._broadcast_table_fn(PrintTable._current_node_id, table)
+        return ()