Brief summary of issue / Description of requested feature:

Quick, which PTB version are you using right now?

Steps to reproduce the issue / Reasons for adding feature:

1. You can read it in multiple places: Mudlet window title, "About" window (in logo), updater window (in plain text)
2. Try to mark and copy text from any of these places
3. Fail. You need a screenshot or write a

为了支持在Lua下对客户端的扩展操作，需要 gomud 提供以下功能的函数：

1. 获取 gomud 所在安装目录的绝对路径 - 便于在 Lua 中读写 gomud 目录下的文件
2. 获取 gomud 所在终端的尺寸（宽高值）- 便于 Lua 输出格式化根据显示窗口大小动态调整
3. 支持文字和背景颜色设置的 Print()