Add TUI support for ARM GDB build under Tools/GNUTools

[Brandon-Hurst]

Request for Improvement -- Enable TUI in ARM GDB build

GDB supports a text-user-interface for debugging via the command-line. ARM GDB optionally supports this depending on the configuration at build time for GDB. MSDK's included GDB for ARM does not support the TUI commands at this time.

Enabling this in future versions would make it easier to debug projects without being tied into a particular IDE or toolset. This can be useful for adding support to open tools which themselves are not tied into a particular IDE by default.

[Brandon-Hurst]

After doing some more research, I discovered the gdb-multiarch package can be used for this purpose. Without requesting a change to the toolchain, developers interested in command-line development can utilize this package for ARM v7-M devices.

Example for Windows/MinGW64: https://packages.msys2.org/packages/mingw-w64-x86_64-gdb-multiarch?repo=mingw64#:~:text=Source-Only%20Tarball: