mark cuid as deprecated

Author: mplanchard

crates/cuid1/Cargo.toml

@@ -9,6 +9,9 @@ authors.workspace = true
 homepage.workspace = true
 repository.workspace = true
 
+[badges]
+maintenance = { status = "deprecated" }
+
 [dev-dependencies]
 criterion = "~0.3"
 

crates/cuid1/README.md

@@ -4,6 +4,11 @@
 [![Crates.io](https://img.shields.io/crates/v/cuid "Crates.io")](https://crates.io/crates/cuid/)
 [![docs.rs](https://docs.rs/cuid/badge.svg)](https://docs.rs/cuid/)
 
+**DEPRECATED**
+
+> Note that this crate has been deprecated in favor of [cuid2](https://crates.io/crates/cuid2),
+> which uses the improved CUID2 algorithm from the [reference implementation](https://github.com/paralleldrive/cuid2).
+
 Cuids are "Collision-resistant ids optimized for horizontal scaling and
 binary search lookup performance."