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Changes in this commit: - Add a extra detail to each of the commands. - Add more about handling options and arguments. - Include shortcut commands that behave like real commands to the command list (e.g. bootloader, rtc). - Add extra information and reword to address common misconceptions, in particular how commands chain together. - Add additional examples showing some more interesting combinations. - Add descriptions to each of the examples. - Add pipx installation instructions. - Describe how user-configuration works. This work was sponsored by Google Season of Docs. Signed-off-by: Jim Mussared <jim.mussared@gmail.com>