Add `create-itk-wasm` package

In itk-wasm/packages/create-itk-wasm/

Generates the skeleton for project in a directory:

- package.json with build and bindgen commands
- CMakeLists.txt
- *.cxx

This is [produced by a main `bin`](https://docs.npmjs.com/cli/v10/commands/npm-init) script. Prompts for description, etc.

Select one or more pipeline types, i.e. text file, binary file, json file, image, mesh, etc. Create .cxx with `pipeline`, inputs, outputs, dispatch on input type for images, meshes.

Can be invoked by [`pnpm create`](https://pnpm.io/cli/create).