Improve MCP

[VJalili]

This PR implements the following improvements on the MCP interface.

• Added a CLI to the MCP server with a --http flag to select transport.
• Added support for running the MCP server over stdio (the default), in addition to Streamable HTTP, so clients that launch the server themselves (e.g., Claude Desktop, MCP inspector) can speak MCP directly over stdin/stdout. This includes routing Serilog console output to stderr so log lines no longer corrupt the stdio JSON-RPC stream.
• Rewrote the MCP README.md
• Added the Address property of Script nodes to the indexed/unique properties list, enabling lookups by address
• When asking for neighbors of a node at n-hop distance, EBA previous used apoc.path.spanningTree. However, it turns out that this method returns one relation per node it visits, so if there are multiple relations between two nodes, all except one, are not returned. This causes a lot of bugs and issues in various computations, e.g., computing a root node's balance given the incoming and outgoing edges with neighbors. This PR replaces apoc.path.spanningTree with apoc.path.subgraphAll to fix this issue.
• Fixed a bug where a small queryLimit produced inaccurate/incomplete neighbor results.
• Fixed a bug in script balance calculation that could include already-spent outputs.
• Fixed a bug in miscalculating paid fee when computing Tx summary.
• Made the working directory configurable via an explicit Options constructor. This allows the MCP CLI to set its own working directory instead of relying on the default session-based path.
• Added an MCP "Cookbook" doc page with example prompts and responses.
• Introduced custom Docusaurus admonition types (Prompt/Response) and restructured the MCP cookbook to use them for improved readability