Feature/Add Neo4j GraphRag support (#3686)

* added: Neo4j database connectivity, Neo4j credentials, supports the usage of the GraphCypherQaChain node and modifies the FewShotPromptTemplate node to handle variables from the prefix field.

* Merge branch 'main' of github.com:FlowiseAI/Flowise into feature/graphragsupport

* revert pnpm-lock.yaml

* add: neo4j package

* Refactor GraphCypherQAChain: Update version to 1.0, remove memory input, and enhance prompt handling

- Changed version from 2.0 to 1.0.
- Removed the 'Memory' input parameter from the GraphCypherQAChain.
- Made 'cypherPrompt' optional and improved error handling for prompt validation.
- Updated the 'init' and 'run' methods to streamline input processing and response handling.
- Enhanced streaming response logic based on the 'returnDirect' flag.

* Refactor GraphCypherQAChain: Simplify imports and update init method signature

- Consolidated import statements for better readability.
- Removed the 'input' and 'options' parameters from the 'init' method, streamlining its signature to only accept 'nodeData'.

* add output, format final response, fix optional inputs

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Co-authored-by: Henry <hzj94@hotmail.com>

packages/components/package.json

@@ -107,6 +107,7 @@
         "moment": "^2.29.3",
         "mongodb": "6.3.0",
         "mysql2": "^3.11.3",
+        "neo4j-driver": "^5.26.0",
         "node-fetch": "^2.6.11",
         "node-html-markdown": "^1.3.0",
         "notion-to-md": "^3.1.1",