fix join command and remove command bug and update docs (#904)

* feat:new command "join" and "remove" to force join or remove avatar in your current team

* fix:change MaxAvatarsInTeam from 9 to 4

* feat:update & merge branch.Translate fix

* fix(command):fix remove command a stupid bug.Loop delete element bug.

* fix(command):fix join command. When adding avatars, repeat avatars skip and non repeat avatars join.

* fix(language):fix join command remove command translate

* fix(ReadMe):update README.md join and remove command.

src/main/resources/languages/zh-CN.json

@@ -237,9 +237,9 @@
       "description": "重载配置文件和数据"
     },
     "remove": {
-      "usage": "用法: remove [indexOfYourTeams] 从1开始",
-      "invalid_index": "下标从1开始",
-      "description": "强制移除队内角色"
+      "usage": "用法: remove [多个角色在队伍中的序号] 序号从1开始",
+      "invalid_index": "序号不合法，从1开始，最大值为队内角色数量",
+      "description": "强制将某个角色从当前队伍中移除。例如`remove 1 2`表示将1号和2号角色从队伍中移除"
     },
     "resetConst": {
       "reset_all": "重置所有角色的命座。",