[Wasm] Add kotlin wasm wasi mode compiler flag

js/js.frontend/src/org/jetbrains/kotlin/js/config/JSConfigurationKeys.java

@@ -121,6 +121,9 @@ public class JSConfigurationKeys {
     public static final CompilerConfigurationKey<Boolean> WASM_GENERATE_WAT =
             CompilerConfigurationKey.create("generate wat file");
 
+    public static final CompilerConfigurationKey<WasmTarget> WASM_TARGET =
+            CompilerConfigurationKey.create("wasm target");
+
     public static final CompilerConfigurationKey<ZipFileSystemAccessor> ZIP_FILE_SYSTEM_ACCESSOR =
             CompilerConfigurationKey.create("zip file system accessor, used for klib reading");
 

js/js.frontend/src/org/jetbrains/kotlin/js/config/WasmTarget.kt

@@ -0,0 +1,19 @@
+/*
+ * Copyright 2010-2023 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.js.config
+
+enum class WasmTarget {
+    JS,
+    WASI;
+
+    companion object {
+        fun fromName(name: String): WasmTarget? = when (name) {
+            "wasm-js" -> JS
+            "wasm-wasi" -> WASI
+            else -> null
+        }
+    }
+}