Currently hints are supported based on hints.yml only, which may be
limiting for some use cases. This introduces a generic plugin approach,
which allows to implement hint module that doesn't require entry in hints.yml.
Such module has the full command output available and it is not limited to
a single regex in hints.yml.
Note that regex in hint.yml expects the output concatenated into a single line,
but hint modules are getting the output unchanged.
Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
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