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

從 crates/spidermonkey-embedding-splicer/src/bindgen.rs 第 857 行開始，使用匯入 map 的 WIT 介面重現 panic。追蹤該輸入所到達的 bindgen 路徑，並在需要時使用 RUST_BACKTRACE=1。完成標準是 ComponentizeJS 能夠處理 component model 的 map 型別，而不會因無法到達的程式碼觸發 panic。

由索引模型根據 Issue 內容生成。