LibWeb: Stub AudioContext constructor

This is enough to make Discord not throw up "Well this is awkward" on
login.

Userland/Libraries/LibWeb/WebAudio/BaseAudioContext.cpp

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2023, Luke Wilde <lukew@serenityos.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#include <LibWeb/Bindings/Intrinsics.h>
+#include <LibWeb/WebAudio/BaseAudioContext.h>
+
+namespace Web::WebAudio {
+
+BaseAudioContext::BaseAudioContext(JS::Realm& realm)
+    : DOM::EventTarget(realm)
+{
+}
+
+BaseAudioContext::~BaseAudioContext() = default;
+
+JS::ThrowCompletionOr<void> BaseAudioContext::initialize(JS::Realm& realm)
+{
+    MUST_OR_THROW_OOM(Base::initialize(realm));
+    set_prototype(&Bindings::ensure_web_prototype<Bindings::BaseAudioContextPrototype>(realm, "BaseAudioContext"));
+
+    return {};
+}
+
+}