Convert simd sample to a multiplatform project

samples/settings.gradle.kts

@@ -45,6 +45,7 @@ if (isMacos) {
     include(":opengl")
     include(":uikit")
     include(":watchos")
+    include(":simd")
 }
 
 if (isWindows) {

samples/simd/build.gradle.kts

@@ -0,0 +1,11 @@
+plugins {
+    kotlin("multiplatform")
+}
+
+kotlin {
+    macosX64 {
+        binaries {
+            executable()
+        }
+    }
+}

samples/simd/src/macosX64Main/kotlin/simd.kt

@@ -1,8 +1,4 @@
-import kotlinx.cinterop.*
-
 import platform.Accelerate.*
-import platform.darwin.*
-
 
 // Custom print
 fun Vector128.toStringHex(): String {