Expand on debugging / backtraces via coredumpctl
https://developer.puri.sm/Librem5/Development_Environment/Boards/Troubleshooting/Debugging.html?highlight=coredumpctl helps to get started but just coredumpctl is not enough. You want matching debug packages (which requires adding a debug repository too) e.g. for phosh/phoc/squeekboard debugging see
https://source.puri.sm/snippets/88
An update to https://source.puri.sm/Librem5/developer.puri.sm/-/blob/master/Development_Environment/Boards/Troubleshooting/Debugging.rst would be nice.
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