KT-63748: Pack Swift Export Frontend into compiler plugin

Co-authored-by: Sergej Jaskiewicz <jaskiewiczs@icloud.com>


Merge-request: KT-MR-13351
Merged-by: Artem Olkov <artem.olkov@jetbrains.com>

native/swift/sir-printer/src/org/jetbrains/sir/printer/SirAsSwiftSourcesPrinter.kt

@@ -8,6 +8,7 @@ package org.jetbrains.sir.printer
 import org.jetbrains.kotlin.sir.*
 import org.jetbrains.kotlin.sir.visitors.SirVisitorVoid
 import org.jetbrains.kotlin.utils.SmartPrinter
+import org.jetbrains.kotlin.utils.withIndent
 
 private const val DEFAULT_INDENT: String = "    "
 
@@ -46,6 +47,14 @@ public class SirAsSwiftSourcesPrinter(private val printer: SmartPrinter) : SirVi
         )
     }
 
+    override fun visitEnum(enum: SirEnum): Unit = with(printer) {
+        println("enum ${enum.name.swiftIdentifier} {")
+        withIndent {
+            enum.acceptChildren(SirAsSwiftSourcesPrinter(printer))
+        }
+        println("}")
+    }
+
     override fun visitForeignFunction(function: SirForeignFunction) {} // we do not write foreign nodes
 
     override fun visitElement(element: SirElement): Unit = with(printer) {