Add cw0 advisory (#2051)

Author: chipshort

crates/cw0/RUSTSEC-0000-0000.md

@@ -0,0 +1,18 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "cw0"
+date = "2024-08-26"
+url = "https://github.com/CosmWasm/cw-plus/issues/471"
+informational = "unmaintained"
+categories = []
+
+[versions]
+patched = []
+```
+
+# `cw0` is unmaintained
+
+The crate `cw0` was first [renamed to `utils`](https://github.com/CosmWasm/cw-plus/pull/508) in 2021 and [then to `cw-utils`](https://github.com/CosmWasm/cw-plus/pull/598) because `utils` was already claimed on crates.io.
+
+The crate `cw0` is not maintained anymore since then and should be replaced with `cw-utils`.