Add a placeholder module for gadgets

src/gadget.rs

@@ -0,0 +1 @@
+//! Self-contained circuit implementations of various primitives.

src/lib.rs

@@ -15,6 +15,7 @@
 
 pub mod arithmetic;
 pub mod circuit;
+pub mod gadget;
 pub mod pasta;
 pub mod plonk;
 pub mod poly;