This migrates the subsys code samples to the new Sphinx code-sample
extension, making it easier to find relevant samples when browsing
API reference.
Signed-off-by: Benjamin Cabé <benjamin@zephyrproject.org>
Use the actual minimum timeout used by the sample for task watchdog
channels (100 ms) as the configuration value for the fallback hardware
watchdog, to avoid unnecessary executions of the timer handler.
Add missing indentation in the documentation of the sample so that
the console output is rendered correctly.
Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>