Adds the `rust-docs-mcp-server` project to the awesome-mcp-servers list within the "Developer Tools" category.
This server addresses the issue of AI assistants using outdated Rust library information by providing an MCP tool (`query_rust_docs`) that delivers context derived directly from current crate documentation using embeddings and LLM summarization.
Refs: https://github.com/Govcraft/rust-docs-mcp-server
