Previously, MCP tools were compiled into the MCP server, so a plug-in
could not offer its own.

Now plug-ins written in C++, Python or Rust can register MCP tools.
Each binding generates a tool's input schema from its parameters and
checks the arguments before the handler runs, so a handler only has to
do the tool's work. A new guide explains how to write a tool in each
language.

Fixes https://github.com/Vector35/binaryninja-api/issues/8484.