chore: add wasm/contracts module index

(cherry picked from commit 1885f718eaf5d66a4d91db01be74f4d8d00b9c0f)

Author: bryanchriswhite

src/mappings/wasm/contracts/index.ts

@@ -0,0 +1,4 @@
+export * from "./almanac";
+export * from "./base";
+export * from "./bridge";
+export * from "./cw20";