Experimenting with Dart/WASM interop in a Dart app.

The Box2D.wasm file comes from box2d-wasm where I:

• removed JS specific code from the C++ glue files before building (see flutter_box2d plugin for more details)
• otherwise, followed the instructions in the READMEs to build
• copied the Box2D.wasm file resulting from the build into this project

Run:

dart run wasm:setup

dart run bin/dart_box2d_wasm.dart

The Dart app:

• loads the wasm as a WasmModule
• prints the available symbols
• builds an instance from the module
• looks up functions in the instance
• uses the functions to create a vector and calculate its length