read/writeactor to process all subclasses of Actor, not just a player; actor possession confirmed working

src/net/torvald/terrarum/modulebasegame/console/Possess.kt

@@ -0,0 +1,30 @@
+package net.torvald.terrarum.modulebasegame.console
+
+import net.torvald.terrarum.Terrarum
+import net.torvald.terrarum.console.ConsoleCommand
+import net.torvald.terrarum.console.Echo
+import net.torvald.terrarum.modulebasegame.TerrarumIngame
+
+/**
+ * Created by minjaesong on 2021-08-29.
+ */
+object Possess : ConsoleCommand {
+
+    override fun execute(args: Array<String>) {
+        if (args.size == 2) {
+            val ingame = Terrarum.ingame!! as TerrarumIngame
+            if (args[1].lowercase() == "reset")
+                ingame.changePossession(ingame.actorGamer)
+            else
+                ingame.changePossession(args[1].toInt())
+        }
+        else {
+            printUsage()
+        }
+    }
+
+    override fun printUsage() {
+        Echo("Usage: possess (id) | possess reset")
+    }
+
+}