FEAT: Ban command, save ops and banned ppl in files

TODO: fix many crashes...

src/commands/CommandBan.cpp

@@ -0,0 +1,52 @@
+#include "CommandBan.hpp"
+#include "commands/Command.hpp"
+#include "network/RakNetInstance.h"
+#include "raknet/RakPeerInterface.h"
+#include "world/level/Level.h"
+#include <algorithm>
+#include <client/Minecraft.h>
+
+CommandBan::CommandBan() : Command("ban") {}
+
+std::string CommandBan::execute(Minecraft& mc, Player& player, const std::vector<std::string>& args) {
+    if (!isPlayerOp(mc, player)) {
+        return "You aren't enough priveleged to run this command";
+    }
+    
+    if (args.empty()) {
+        return help(mc);
+    }
+
+    std::string nicknameLower = args[0];
+    std::transform(nicknameLower.begin(), nicknameLower.end(), nicknameLower.begin(), ::tolower);
+
+    auto it = std::find_if(mc.level->players.begin(), mc.level->players.end(), [args, nicknameLower] (auto& it) -> bool {
+        std::string lower = it->name;
+        std::transform(lower.begin(), lower.end(), lower.begin(), ::tolower);
+
+        return lower == nicknameLower;
+    });
+
+    if (*it == (Player*)mc.player) {
+        return "ban: you can't ban urself lol";
+    }
+    
+    if (it != mc.level->players.end()) {
+        mc.level->removePlayer(*it);
+        (*it)->remove();
+        mc.raknetInstance->getPeer()->CloseConnection((*it)->owner, true);
+    } else {
+        for (auto& banned : mc.level->bannedPpl) {
+            if (nicknameLower == banned) {
+                return args[0] + "already banned!";
+            }
+        }
+    }
+
+    mc.level->bannedPpl.insert(nicknameLower);
+    return "ban: successfully banned player " + args[0];
+}
+
+std::string CommandBan::help(Minecraft& mc) {
+    return "Usage: /ban <player>";
+}