feat(wasm): add feature to convert Rust into Wasm

💪 reimplement cargo.js to be synchronous because jest doesn't support async transform
📋 some function are copied from ts-jest while the others are from rollup-plugin-rust
⚠️ it must generate cjs module, not es6 module (jest only accept cjs module)
🙄 default options are same as rollup-plugin-rust
🔭 see test/fixtures/**/jest.config.js for how to set the options
✍️ refactor the project structure to make it easier to be traversed

Author: DrSensor

index.d.ts

@@ -0,0 +1,5 @@
+declare interface RsJest extends jest.Transformer {
+  createTransformer(options?: any): jest.Transformer;
+}
+
+export = RsJest;