EGE/src/ege/image: 简化 IMAGE 类初始化。

Signed-off-by: FrankHB <frankhb1989@gmail.com>
EGE/src/ege/global: 简化退出。

Signed-off-by: FrankHB <frankhb1989@gmail.com>
EGE/src/ege/global.h: 删除无用声明。

Signed-off-by: FrankHB <frankhb1989@gmail.com>
EGE/src/ege/global.cpp: 合并内部函数定义和调用。

Signed-off-by: FrankHB <frankhb1989@gmail.com>
EGE 库：移除宏 CONVERT_IMAGE_END 。

Signed-off-by: FrankHB <frankhb1989@gmail.com>
EGE 库：移除宏 CONVERT_IMAGE_F 和 CONVERT_IMAGE_F_CONST 。

Signed-off-by: FrankHB <frankhb1989@gmail.com>
egestar/egestar.cpp, tutorial/tutorial.cpp: 移除附加窗口设置。

Signed-off-by: FrankHB <frankhb1989@gmail.com>
EGE 库：移除函数 attachHWND 。

Signed-off-by: FrankHB <frankhb1989@gmail.com>
EGE 库：取消函数 setrendermode 的效果；移除无用的计时器例程、状态和消息响应。

Signed-off-by: FrankHB <frankhb1989@gmail.com>
EGE/src/ege/: 封装窗口退出标记。

Signed-off-by: FrankHB <frankhb1989@gmail.com>
EGE/src/ege/global: 全局内部封装窗口退出状态。

Signed-off-by: FrankHB <frankhb1989@gmail.com>
EGE 库：窗口退出状态直接依赖线程状态。

Signed-off-by: FrankHB <frankhb1989@gmail.com>