new: implement web audio player with support for js and wasmJs platforms

core/audioplayer/build.gradle.kts

@@ -48,6 +48,15 @@ kotlin {
             implementation(project.dependencies.platform(libs.koin.bom))
             implementation(libs.koin.core)
         }
+        // webMain is the js + wasmJs intermediate source set from the default hierarchy template.
+        webMain.dependencies {
+            // Browser audio (HTMLAudioElement, document) for js + wasmJs
+            implementation(libs.kotlinx.browser)
+        }
+        wasmJsMain {
+            // HTMLAudioElement interop on Wasm requires this opt-in.
+            languageSettings.optIn("kotlin.js.ExperimentalWasmJsInterop")
+        }
         commonTest.dependencies {
             implementation(libs.kotlin.test)
         }