fix the outline style lost when overriding TextMeshPro Font

[ekibun]

The outine style defined in material will lost when overriding font. This pr is going to copy the style to a new material.

[DeathPayner]

'G:\EZ\arialunisdfu' can't be loaded because another AssetBundle with the same files is already loaded. 还是无法加载字体包，这个有办法解决吗。il2cpp得

[ekibun]

'G:\EZ\arialunisdfu' can't be loaded because another AssetBundle with the same files is already loaded. 还是无法加载字体包，这个有办法解决吗。il2cpp得

不是这个pr要改的内容，请开新的issue。

AB只能加载一次，可能是其他插件读取了这个东西或者和游戏某个文件重复了，建议换个字体文件试试。