Added /talent command

Set current character talent level by using /talent command.
> /talent getid - Gets current character talent ID
> /talent set <talent ID> <level> - Sets current character's talent level

src/main/java/emu/grasscutter/command/commands/TalentCommand.java

+package emu.grasscutter.command.commands;
+
+import emu.grasscutter.command.Command;
+import emu.grasscutter.command.CommandHandler;
+import emu.grasscutter.game.GenshinPlayer;
+import emu.grasscutter.game.avatar.GenshinAvatar;
+import emu.grasscutter.game.entity.EntityAvatar;
+import emu.grasscutter.game.props.FightProperty;
+import emu.grasscutter.server.packet.send.PacketAvatarSkillChangeNotify;
+import emu.grasscutter.server.packet.send.PacketAvatarSkillUpgradeRsp;
+import emu.grasscutter.server.packet.send.PacketEntityFightPropUpdateNotify;
+
+import java.util.List;
+
+@Command(label = "talent", usage = "talent <talentID> <value>",
+        description = "Set talent level for your current active character", permission = "player.settalent")
+public class TalentCommand implements CommandHandler {
+
+    @Override
+    public void execute(GenshinPlayer sender, List<String> args) {
+        if (sender == null) {
+            CommandHandler.sendMessage(null, "Run this command in-game.");
+            return;
+        }
+
+        if (args.size() < 0 || args.size() < 1){
+            CommandHandler.sendMessage(sender, "To set talent level: /talent set <talentID> <value>");
+            CommandHandler.sendMessage(sender, "To get talent ID: /talent getid");
+            return;
+        }
+
+        String cmdSwitch = args.get(0);
+        switch (cmdSwitch) {
+            default:
+                CommandHandler.sendMessage(sender, "To set talent level: /talent set <talentID> <value>");
+                CommandHandler.sendMessage(sender, "To get talent ID: /talent getid");
+            return;
+            case "set":
+                    try {
+                        int skillId = Integer.parseInt(args.get(1));
+                        int nextLevel = Integer.parseInt(args.get(2));
+                        EntityAvatar entity = sender.getTeamManager().getCurrentAvatarEntity();
+                        GenshinAvatar avatar = entity.getAvatar(); 
+                        int skillIdNorAtk = avatar.getData().getSkillDepot().getSkills().get(0);
+                        int skillIdE = avatar.getData().getSkillDepot().getSkills().get(1);
+                        int skillIdQ = avatar.getData().getSkillDepot().getEnergySkill();
+                        int currentLevelNorAtk = avatar.getSkillLevelMap().get(skillIdNorAtk);
+                        int currentLevelE = avatar.getSkillLevelMap().get(skillIdE);
+                        int currentLevelQ = avatar.getSkillLevelMap().get(skillIdQ);
+                        if (args.size() < 2){
+                            CommandHandler.sendMessage(sender, "To set talent level: /talent set <talentID> <value>");
+                            CommandHandler.sendMessage(sender, "To get talent ID: /talent getid");
+                            return;
+                        }
+                        if (nextLevel > 16){ 
+                            CommandHandler.sendMessage(sender, "Invalid talent level. Level should be lower than 16");
+                            return;
+                        }
+                            if (skillId == skillIdNorAtk){ 
+                            // Upgrade skill
+                            avatar.getSkillLevelMap().put(skillIdNorAtk, nextLevel);
+                            avatar.save();
+                
+                            // Packet
+                            sender.sendPacket(new PacketAvatarSkillChangeNotify(avatar, skillIdNorAtk, currentLevelNorAtk, nextLevel));
+                            sender.sendPacket(new PacketAvatarSkillUpgradeRsp(avatar, skillIdNorAtk, currentLevelNorAtk, nextLevel));
+                            CommandHandler.sendMessage(sender, "Set talent Normal ATK to " + nextLevel + ".");
+                        }    
+                        if (skillId == skillIdE){ 
+                            // Upgrade skill
+                            avatar.getSkillLevelMap().put(skillIdE, nextLevel);
+                            avatar.save();
+                
+                            // Packet
+                            sender.sendPacket(new PacketAvatarSkillChangeNotify(avatar, skillIdE, currentLevelE, nextLevel));
+                            sender.sendPacket(new PacketAvatarSkillUpgradeRsp(avatar, skillIdE, currentLevelE, nextLevel));
+                            CommandHandler.sendMessage(sender, "Set talent E to " + nextLevel + ".");
+                        }
+                        if (skillId == skillIdQ){ 
+                            // Upgrade skill
+                            avatar.getSkillLevelMap().put(skillIdQ, nextLevel);
+                            avatar.save();
+                
+                            // Packet
+                            sender.sendPacket(new PacketAvatarSkillChangeNotify(avatar, skillIdQ, currentLevelQ, nextLevel));
+                            sender.sendPacket(new PacketAvatarSkillUpgradeRsp(avatar, skillIdQ, currentLevelQ, nextLevel));
+                            CommandHandler.sendMessage(sender, "Set talent Q to " + nextLevel + ".");
+                        }       
+                                
+                    } catch (NumberFormatException ignored) {
+                        CommandHandler.sendMessage(sender, "Invalid skill ID.");
+                        return;
+                    }
+                
+                break;
+            case "getid":           
+                    EntityAvatar entity = sender.getTeamManager().getCurrentAvatarEntity();
+                    GenshinAvatar avatar = entity.getAvatar(); 
+                    int skillIdNorAtk = avatar.getData().getSkillDepot().getSkills().get(0);
+                    int skillIdE = avatar.getData().getSkillDepot().getSkills().get(1);
+                    int skillIdQ = avatar.getData().getSkillDepot().getEnergySkill();
+                    
+                    CommandHandler.sendMessage(sender, "Normal Attack ID " + skillIdNorAtk + ".");
+                    CommandHandler.sendMessage(sender, "E skill ID " + skillIdE + ".");
+                    CommandHandler.sendMessage(sender, "Q skill ID " + skillIdQ + ".");
+                break;
+        }
+    }
+}