新功能：show-item armor & show-stat

[muderstar]

优化输出信息

可以改一下输出信息，show item message可以这么改（例子）

$\text{\color{gray}{Tester} \color{dark}{is holding} [Diamond Sword]}$

show entity
$\text{\color{gray}{Tester} \color{dark}{is looking at} [Zombie]}$

show block
$\text{\color{gray}{Tester} \color{dark}{is looking at} [Grass]}$

show item armor

/show-item armor hemlet|chestplate|legging|boots
或
/show-item armor h|c|l|b

$\text{\color{gray}{Tester} \color{dark}{is wearing} [Diamond Chestplate]}$

Show stat

/show-stat

展示你所有的属性（如health,armor,...)
$\text{\color{gray}{Tester} \color{dark}{'s stat:} }$
$\text{xxx.xxx.xxx : xxx}$
...