Support component model `map<K, V>`

A while back the component model introduced `map` (https://github.com/WebAssembly/component-model/pull/554). I have a WIT interface which imports this, which I think might be the cause for the following ComponentizeJS panic:

```
thread '' (1) panicked at crates/spidermonkey-embedding-splicer/src/bindgen.rs:857:18:
internal error: entered unreachable code
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
An error occured while building the WASI component: RuntimeError: unreachable
```

https://github.com/bytecodealliance/ComponentizeJS/blob/12c2b4a25033f65047f8ec5c5fb9e3013bfc4950/crates/spidermonkey-embedding-splicer/src/bindgen.rs#L857

Comece em crates/spidermonkey-embedding-splicer/src/bindgen.rs na linha 857 e reproduza o panic com uma interface WIT que importe map. Rastreie o caminho de bindgen alcançado por essa entrada e use RUST_BACKTRACE=1 se necessário. Está concluído quando o ComponentizeJS tratar o tipo map do component model sem o panic de código inalcançável.

Escrita pelo modelo de indexação a partir do texto da issue.