feat(web)!: use the WASM module in the bindings, and not the other way around

Parser is no longer the default export, but you *must* call
`Parser.init()` before doing anything still

xtask/src/main.rs

@@ -85,6 +85,10 @@ struct BuildWasm {
     /// Rebuild when relevant files are changed.
     #[arg(long, short)]
     watch: bool,
+    /// Emit TypeScript type definitions for the generated bindings,
+    /// requires `tsc` to be available.
+    #[arg(long, short)]
+    emit_tsd: bool,
 }
 
 #[derive(Args)]