add help docs and ?

docs/nodes/Note.md

@@ -0,0 +1,26 @@
+# Note
+
+Read the Note metadata from an .ibw (Igor binary wave) file and display all entries as a table of key/value pairs.
+
+## Inputs
+
+| Name | Type | Required | Description |
+|------|------|----------|-------------|
+| path | FILE_PATH | No | File path from a Folder or other path node; overrides the filename widget |
+
+## Outputs
+
+| Name | Type | Description |
+|------|------|-------------|
+| note | DATA_TABLE | Key/value table of all metadata entries from the IBW note |
+
+## Controls
+
+| Name | Type | Default | Description |
+|------|------|---------|-------------|
+| filename | FILE_PICKER | "" | Path to the .ibw file; hidden when path input is connected |
+
+## Limitations
+
+- Only .ibw files are supported; other formats raise an error.
+- If the .ibw note section is empty or missing, an error is raised.