Pass CommandContext to commands

CommandContext is the carrier of dependencies.
Currently, it only carries a DropProvider, but
it will grow bit by bit as more static singletons
and other similar structures get refactored.

src/main/java/client/command/commands/gm3/CheckDmgCommand.java

@@ -27,6 +27,7 @@ import client.BuffStat;
 import client.Character;
 import client.Client;
 import client.command.Command;
+import client.command.CommandContext;
 
 public class CheckDmgCommand extends Command {
     {
@@ -34,7 +35,7 @@ public class CheckDmgCommand extends Command {
     }
 
     @Override
-    public void execute(Client c, String[] params) {
+    public void execute(Client c, String[] params, CommandContext ctx) {
         Character player = c.getPlayer();
         Character victim = c.getWorldServer().getPlayerStorage().getCharacterByName(params[0]);
         if (victim != null) {