Multi-module arrangement and the start of AST generation.

buildSrc/src/main/kotlin/pork_module.gradle.kts

@@ -0,0 +1,25 @@
+import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
+
+plugins {
+  kotlin("jvm")
+  kotlin("plugin.serialization")
+}
+
+repositories {
+  mavenCentral()
+}
+
+java {
+  val javaVersion = JavaVersion.toVersion(17)
+  sourceCompatibility = javaVersion
+  targetCompatibility = javaVersion
+}
+
+tasks.withType<KotlinCompile> {
+  kotlinOptions.jvmTarget = "17"
+}
+
+dependencies {
+  implementation("org.jetbrains.kotlin:kotlin-bom")
+  implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.6.0")
+}