adds the /kill command

pumpkin/src/commands/cmd_kill.rs

@@ -0,0 +1,35 @@
+use pumpkin_core::text::{color::NamedColor, TextComponent};
+use crate::commands::tree::CommandTree;
+use crate::commands::arg_player::{consume_arg_player, parse_arg_player};
+use crate::commands::tree::RawArgs;
+use crate::commands::CommandSender;
+use crate::commands::tree_builder::argument;
+
+const NAMES: [&str; 1] = ["kill"];
+const DESCRIPTION: &str = "Kills a target player.";
+
+const ARG_TARGET: &str = "target";
+
+pub fn consume_arg_target(_src: &CommandSender, args: &mut RawArgs) -> Option<String> {
+    consume_arg_player(_src, args)
+}
+
+pub(crate) fn init_command_tree<'a>() -> CommandTree<'a> {
+    CommandTree::new(NAMES, DESCRIPTION)
+        .with_child(
+            argument(ARG_TARGET, consume_arg_target)
+                .execute(&|sender, server, args| {
+                    let target = parse_arg_player(sender, server, ARG_TARGET, args)?;
+                    target.entity.kill();
+                    target.send_system_message(TextComponent::text(
+                        "You have been killed."
+                    ).color_named(NamedColor::Red));
+
+                    sender.send_message(TextComponent::text(
+                        "Player has been killed."
+                    ).color_named(NamedColor::Blue));
+
+                    Ok(())
+                })
+        )
+}