Add missing license metadata to mcp-macro #34
Description
The Cargo.toml manifest file of the mcp-macro crate does not contain a license metadata, which makes cargo-deny fails.
error[unlicensed]: mcp-macros = 1.0.7 is unlicensed ┌─ git+https://github.com/modelcontextprotocol/rust-sdk.git?rev=4597d1f047416a2f51e35372bc35b02aae2ec8b0#mcp-macros@1.0.7:2:9 │ 2 │ name = "mcp-macros" │ ━━━━━━━━━━ a valid license expression could not be retrieved for the crate 3 │ version = "1.0.7" 4 │ license = "" │ ─ license expression was not specified