util: Add description for crates.io

Signed-off-by: Peter Neuroth <[email protected]>

Author: nepet

libs/gl-util/Cargo.toml

@@ -2,6 +2,11 @@
 name = "gl-util"
 version = "0.1.0"
 edition = "2024"
+authors = ["The Greenlight Team"]
+description = "Utility module for the Greenlight client library"
+homepage = "https://blockstream.github.io/greenlight/"
+repository = "https://github.com/Blockstream/greenlight"
+license = "MIT"
 
 [dependencies]
 bytes = "1.10"