refactor: add packer module

packer/build.gradle.kts

@@ -0,0 +1,34 @@
+plugins {
+    id("java")
+    alias(libs.plugins.lombok)
+    id("maven-publish-convention")
+}
+
+group = "io.github.reajason"
+description = "Java deserialize payload for MemShellParty"
+version = rootProject.version
+
+dependencies {
+    implementation(project(":memshell-party-common"))
+    implementation(libs.bcel)
+    implementation(libs.bundles.jna)
+    implementation(libs.jackson.databind)
+    implementation("com.caucho:hessian:4.0.66")
+    implementation("commons-beanutils:commons-beanutils:1.9.2")
+    implementation("commons-collections:commons-collections:3.2.1")
+    implementation("org.apache.commons:commons-collections4:4.0")
+    testImplementation(libs.junit.jupiter)
+    testRuntimeOnly(libs.junit.platform.launcher)
+}
+
+java {
+    toolchain {
+        languageVersion = JavaLanguageVersion.of(8)
+    }
+    sourceCompatibility = JavaVersion.VERSION_1_8
+    targetCompatibility = JavaVersion.VERSION_1_8
+}
+
+tasks.test {
+    useJUnitPlatform()
+}