Fix some clientbound message bugs

send signed message{wip}

libmc-protocol/build.gradle.kts

@@ -14,6 +14,8 @@ kotlin {
         commonMain.dependencies {
             api(project(":common"))
             api(project(":nbt"))
+            implementation(libs.cryptography.core)
+            implementation(libs.cryptography.provider.optimal)
         }
 
         jvmMain.dependencies {}