Makes some changes in preparation for some commands that need to be added

Prepares the new command layout, changes the .add permission to .manage and adds 4 empty command classes

src/main/java/net/knarcraft/paidsigns/command/RemoveConditionCommand.java

@@ -0,0 +1,15 @@
+package net.knarcraft.paidsigns.command;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.jetbrains.annotations.NotNull;
+
+public class RemoveConditionCommand implements CommandExecutor {
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender sender, @NotNull Command command, @NotNull String label, @NotNull String[] args) {
+        return false;
+    }
+
+}