Add Cargo.toml metadata

Author: dandavison

temporalio/bridge/Cargo.toml

@@ -2,6 +2,10 @@
 name = "temporal-sdk-bridge"
 version = "0.1.0"
 edition = "2021"
+description = "Python sdk-core bridge"
+license = "MIT"
+repository = "https://github.com/temporalio/sdk-python"
+documentation = "https://docs.temporal.io/dev-guide/python"
 
 [package.metadata.maturin]
 module-name = "temporalio.bridge.temporal_sdk_bridge"