First draft of multiplatform support

Things aren't 100% yet, but this is enough code at this point that
things are compiling.

Figuring out raw mode still needs to be supported, and a few other
"NotImplementedYet" places still need to be resolved. Also, we
probably need to add a bit more test coverage for missing locations.

examples/native/README.md

@@ -0,0 +1,9 @@
+An example that shows how to generate native releases for Kotter applications.
+
+Check out this project's `build.gradle.kts` file to see how this is set up.
+
+For native builds, you must build them on the proper host machine -- for example, Windows binaries should get built on
+Windows machines and Linux binaries should get built on Linux machines.
+
+You can probably use something like GitHub CI to provision different host macines in order to generate artifacts for all
+three platforms.

examples/native/build.gradle.kts

@@ -0,0 +1,46 @@
+plugins {
+    alias(libs.plugins.kotlin.multiplatform)
+    application
+}
+
+group = "com.varabyte.kotter"
+version = "1.0-SNAPSHOT"
+
+
+repositories {
+    mavenCentral()
+}
+
+kotlin {
+    val hostOs = System.getProperty("os.name")
+    val isMingwX64 = hostOs.startsWith("Windows")
+    val nativeTarget = when {
+        hostOs == "Mac OS X" -> macosX64("native")
+        hostOs == "Linux" -> linuxX64("native")
+        isMingwX64 -> mingwX64("native")
+        else -> throw GradleException("Host OS is not supported in Kotlin/Native.")
+    }
+
+    nativeTarget.apply {
+        binaries {
+            executable {
+                entryPoint = "main"
+            }
+        }
+    }
+
+    sourceSets {
+        val nativeMain by getting {
+            dependencies {
+                implementation(project(":kotter"))
+                implementation(libs.kotlinx.coroutines)
+            }
+        }
+    }
+}
+
+
+application {
+    mainClass.set("MainKt")
+}
+