Add Faust WebAssembly compile lane

README.md

@@ -63,6 +63,9 @@ published packages.
   from `AquaSynth.Faust`.
 - `FaustCompiler.CompileAsync(source, options)` writes generated backend code
   through an installed or resolved Faust compiler from `AquaSynth.Faust`.
+- `FaustCompiler.CompileWebAssemblyScriptAsync(...)` and
+  `CompileWebAssemblyAsync(...)` emit browser-ready `.dsp`, `.wasm`, and Faust
+  JSON UI metadata artifacts.
 - `AquaSynthPatchCompiler` from `AquaSynth.Faust` is the live host-facing
   boundary for compiling `.aqua` scripts into hosted DSP factories.
 - `AquaSynthNativeCompiler` remains the lower native `libfaust` compiler
@@ -92,6 +95,16 @@ await FaustCompiler.CompileAsync(
     new FaustCompileOptions(FaustTargetLanguage.CSharp, "Generated/Bass.cs"));
 ```
 
+The browser lane uses Faust's WebAssembly backend and keeps the same ownership:
+AquaSynth emits the `.dsp`, `.wasm`, and JSON UI description; the host supplies
+WebAudio scheduling and parameter binding.
+
+```csharp
+await FaustCompiler.CompileWebAssemblyScriptAsync(
+    "v w=sin f=880 g=.12 sustain=.04 decay=.2",
+    new FaustWebAssemblyCompileOptions("Generated/Web", "ui_select"));
+```
+
 The runtime lane is different. AquaSynth should own Faust toolchain selection,
 compile cache identity, generated artifacts, parameter manifests, and dynamic
 patch compilation outside the realtime path. Aquarium Engine should load and