Supporting web debugging with cdt-gdb-adapter

Hi all,

VSCode and Theia platforms support browser based environments and debug from browser operation. It would be good to improve cdt-gdb-adapter and make the package browser compilant. For this purpose, we (@jonahgraham , @asimgunes) are planning to propose an improvement for cdt-gdb-adapter. The main goal is to create a browser entrypoint which exports browser compilant GDBDebugSession and GDBTargetDebugSession classes.

Main scope of the proposed update:
* Export a browser entrypoint.
* Export browser compilant GDBDebugSession and GDBTargetDebugSession classes.
* Leave browser based gdb/gdbserver process managament (starting, stopping and communicating with the processes) out of context.
* Provide injection points to handle gdb/gdbserver processes separately.

I would be happy to discuss any concerns or suggestions.

Best regards
Asim