feat: add folder support for workflows (fixes #70)

workflows/Gmail/0221_Gmail_Movebinarydata_Send.json

@@ -0,0 +1,92 @@
+{
+  "nodes": [
+    {
+      "name": "Gmail",
+      "type": "n8n-nodes-base.gmail",
+      "notes": "Get email with JSON file",
+      "position": [
+        620,
+        140
+      ],
+      "parameters": {
+        "limit": 1,
+        "operation": "getAll",
+        "additionalFields": {}
+      },
+      "credentials": {
+        "gmailOAuth2": {
+          "id": "16",
+          "name": "gmail"
+        }
+      },
+      "notesInFlow": true,
+      "typeVersion": 1
+    },
+    {
+      "name": "write spreadsheet file",
+      "type": "n8n-nodes-base.spreadsheetFile",
+      "position": [
+        980,
+        140
+      ],
+      "parameters": {
+        "options": {
+          "fileName": "users_spreadsheet.csv"
+        },
+        "operation": "toFile",
+        "fileFormat": "csv"
+      },
+      "typeVersion": 1
+    },
+    {
+      "name": "move binary data ",
+      "type": "n8n-nodes-base.moveBinaryData",
+      "position": [
+        800,
+        140
+      ],
+      "parameters": {
+        "options": {}
+      },
+      "typeVersion": 1
+    },
+    {
+      "name": "Note6",
+      "type": "n8n-nodes-base.stickyNote",
+      "position": [
+        200,
+        160
+      ],
+      "parameters": {
+        "width": 320,
+        "height": 80,
+        "content": "## JSON file > Sheets"
+      },
+      "typeVersion": 1
+    }
+  ],
+  "connections": {
+    "Gmail": {
+      "main": [
+        [
+          {
+            "node": "move binary data ",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    },
+    "move binary data ": {
+      "main": [
+        [
+          {
+            "node": "write spreadsheet file",
+            "type": "main",
+            "index": 0
+          }
+        ]
+      ]
+    }
+  }
+}