`cppdbg` add `postRunCommands` config in `launch.json`

[WittonBell]

Feature Request

When using cppdbg debugging type, it is desirable to add an opportunity to run the specified debugging commands after starting the specified program and before running the program. Refer to the postRunCommands of codelldb debugging type. This is very useful in some cases, such as on Windows, where you can call p (int) SetConsoleOutputCP(65001) to set the character set of the console to display characters correctly.

postRunCommands see https://github.com/vadimcn/codelldb/blob/master/MANUAL.md

[github-actions]

Thank you for your feature request. While we may not be able to implement it immediately, we will monitor community reactions to see how it fits into our backlog. Additionally, if you're working with GDB/LLDB, please note that the code is open source at https://github.com/microsoft/MIEngine/wiki/Contributing-Code . Your contributions are always welcome and appreciated.