This commit adds a detailed JSON node test workflow configuration in json_node_test.json. The workflow demonstrates the functionality of various JSON manipulation nodes, including:
- JSONGeneratorNode
- JSONParserNode
- JSONObjectIteratorNode
- JSONArrayIteratorNode
- JSONKeyCheckerNode
- JSONMergeNode
- JSONModifierNode
- RandomJSONValueNode
- JSONLengthNode
The test workflow provides practical examples of how these nodes can be used to process and manipulate JSON data in different scenarios.
