MCP client support (#427)

- MCP client service
- Tool request/response schema
- API gateway support for mcp-tool
- Message translation for tool request & response
- Make mcp-tool using configuration service for information
  about where the MCP services are.

trustgraph-flow/setup.py

@@ -49,6 +49,7 @@ setuptools.setup(
         "langchain-community",
         "langchain-core",
         "langchain-text-splitters",
+        "mcp",
         "minio",
         "mistralai",
         "neo4j",
@@ -99,6 +100,7 @@ setuptools.setup(
         "scripts/kg-store",
         "scripts/kg-manager",
         "scripts/librarian",
+        "scripts/mcp-tool",
         "scripts/metering",
         "scripts/object-extract-row",
         "scripts/oe-write-milvus",