Add unmaintained advisory for tsify-next

Author: threema-theo

crates/tsify-next/RUSTSEC-0000-0000.md

@@ -0,0 +1,15 @@
+```toml
+[advisory]
+id = "RUSTSEC-0000-0000"
+package = "tsify-next"
+date = "2025-07-29"
+url = "https://github.com/siefkenj/tsify/pull/56"
+references = ["https://github.com/siefkenj/tsify/issues/57"]
+informational = "unmaintained"
+[versions]
+patched = []
+```
+
+# tsify-next is unmaintained, use tsify instead
+
+The `tsify-next` crate is not maintained any more; use [`tsify`](https://crates.io/crates/tsify) instead.