Export curves to allow terminating wasm threads (curve.terminate) from outside code

Author: OBrezhniev

main.js

@@ -5,3 +5,4 @@ export * as wtns from "./src/wtns.js";
 export * as zKey from "./src/zkey.js";
 export * as plonk from "./src/plonk.js";
 export * as fflonk from "./src/fflonk.js";
+export * as curves from "./src/curves.js";