SumatraPDF adds the ability to save annotations to TXT text

Since I like to export the annotations as reading notes after reading the PDF, I have added this function.

SumatraPDF

Open Source PDF Reader

used mupdf

Project settings

Some projects need to adjust language standards:

VS项目设置 常规 C++语言标准 17或14
VS项目设置 C/C++ 常规 将警告视为错误 否

Added ability to save annotations to TXT text

Using sumatrapdf-3.3

translations.txt file added

：Save AnnotationsToTXT
cn:保存标注到TXT

Add CmdSaveAnnotationsToTXT menu to mimic CmdSaveAnnotations

Commands.h file added

V(CmdSaveAnnotationsToTXT, "Save AnnotationsToTXT")                   \

Menu.cpp file added

{ _TRN("Save AnnotationsToTXT"),             CmdSaveAnnotationsToTXT,        MF_REQ_DISK_ACCESS },

 case CmdSaveAnnotationsToTXT:
 case CmdNewBookmarks:
     // handle in FrameOnCommand() i