Code Generation for TypedKeys (#9233)

Currently includes generated key holder classes for types
used in the Registry Modification API

paper-api-generator/build.gradle.kts

@@ -0,0 +1,28 @@
+import org.spongepowered.gradle.vanilla.repository.MinecraftPlatform
+
+plugins {
+    java
+    id("org.spongepowered.gradle.vanilla") version "0.2.1-SNAPSHOT"
+}
+
+minecraft {
+    version(property("mcVersion").toString())
+    platform(MinecraftPlatform.SERVER)
+
+    runs {
+        server("generate") {
+            mainClass("io.papermc.generator.Main")
+            accessWideners(projectDir.toPath().resolve("wideners.at"))
+            args(projectDir.toPath().resolve("generated").toString())
+        }
+    }
+}
+
+dependencies {
+    implementation("com.squareup:javapoet:1.13.0")
+    implementation(project(":paper-api"))
+}
+
+group = "io.papermc.paper"
+version = "1.0-SNAPSHOT"
+