Fix instantiate subclass if constructor parameter is the command's type#428

I have my own subclass within an ACF command for my own use, but ACF will try to instantiate them as long as its only has 1 constructor parameter even if it doesn't related to adding a subcommand. So I added a isAssignableFrom check for the correct parameter type before ACF should try to instantiate. ``` [11:32:06 WARN]: java.lang.IllegalArgumentException: argument type mismatch [11:32:06 WARN]: at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:65) [11:32:06 WARN]: at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502) [11:32:06 WARN]: at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.external.acf.commands.BaseCommand.registerSubclasses(BaseCommand.java:291) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.external.acf.commands.BaseCommand.onRegister(BaseCommand.java:259) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.external.acf.commands.BaseCommand.onRegister(BaseCommand.java:228) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.external.acf.commands.BukkitCommandManager.registerCommand(BukkitCommandManager.java:233) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.external.acf.commands.BukkitCommandManager.registerCommand(BukkitCommandManager.java:266) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.core.MultiverseCore.lambda$registerCommands$9(MultiverseCore.java:204) [11:32:06 WARN]: at java.base/java.lang.Iterable.forEach(Iterable.java:75) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.core.MultiverseCore.lambda$registerCommands$10(MultiverseCore.java:201) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.external.vavr.control.Try.andThenTry(Try.java:250) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.core.MultiverseCore.registerCommands(MultiverseCore.java:200) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.core.MultiverseCore.lambda$onEnable$0(MultiverseCore.java:116) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.external.vavr.control.Try.andThenTry(Try.java:309) [11:32:06 WARN]: at multiverse-core-local.jar//org.mvplugins.multiverse.core.MultiverseCore.onEnable(MultiverseCore.java:111) [11:32:06 WARN]: at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:280) [11:32:06 WARN]: at io.papermc.paper.plugin.manager.PaperPluginInstanceManager.enablePlugin(PaperPluginInstanceManager.java:202) [11:32:06 WARN]: at io.papermc.paper.plugin.manager.PaperPluginManagerImpl.enablePlugin(PaperPluginManagerImpl.java:109) [11:32:06 WARN]: at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:520) [11:32:06 WARN]: at org.bukkit.craftbukkit.CraftServer.enablePlugin(CraftServer.java:657) [11:32:06 WARN]: at org.bukkit.craftbukkit.CraftServer.enablePlugins(CraftServer.java:606) [11:32:06 WARN]: at net.minecraft.server.MinecraftServer.loadWorld0(MinecraftServer.java:743) [11:32:06 WARN]: at net.minecraft.server.MinecraftServer.loadLevel(MinecraftServer.java:488) [11:32:06 WARN]: at net.minecraft.server.dedicated.DedicatedServer.initServer(DedicatedServer.java:322) [11:32:06 WARN]: at net.minecraft.server.MinecraftServer.runServer(MinecraftServer.java:1163) [11:32:06 WARN]: at net.minecraft.server.MinecraftServer.lambda$spin$2(MinecraftServer.java:310) [11:32:06 WARN]: at java.base/java.lang.Thread.run(Thread.java:1583) [11:32:06 WARN]: Caused by: java.lang.ClassCastException: Cannot cast org.mvplugins.multiverse.core.commands.ConfirmCommand to org.mvplugins.multiverse.core.command.MVCommandManager [11:32:06 WARN]: at java.base/java.lang.Class.cast(Class.java:4067) [11:32:06 WARN]: at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62) [11:32:06 WARN]: ... 27 more ```