Fix generate_msg_docs.py IndexError when a .msg file declares a single
topic that does not match the camel_to_snake default (e.g.
AuxGlobalPosition.msg). The error message referenced self.topics[1]
(out of bounds) instead of self.topics[0].
Fix camel_to_snake() regex to correctly convert names like
"AuxGlobalPosition" to "aux_global_position". The previous regex
produced "aux_globalposition" because it failed to insert an underscore
between a lowercase letter and an uppercase letter mid-word.
Also remove stderr redirection (2>&1) from all make targets in
metadata_sync.sh so that errors are visible in CI logs even in
non-verbose mode, making failures easier to diagnose.
Signed-off-by: Ramon Roche <mrpollo@gmail.com>
9048a40277