Alarm management: `ietf-alarms` YANG module for sysrepo

With this daemon, sysrepo applications can implement the ietf-alarms YANG module from RFC 8632. As an app developer, you simply:

create the required alarm identities based on al:alarm-type
provide the list of possible alarms
execute an internal RPC each time an alarm event occurs

This daemon takes care of the rest:

alarm shelving
alarm summaries and statistics
alarm notifications
in future, alarm history

Dependencies

libyang-cpp - C++ bindings for libyang
sysrepo-cpp - C++ bindings for sysrepo
C++20 compiler (e.g., GCC 10.x+, clang 10+)
CMake 3.19+
Boost 1.78+ (header-only is sufficient)
pkg-config
spdlog
fmt - C++ string formatting library
date for time zones handling
docopt for command line options
doctest for unit testing
trompeloeil for unit testing

Contributing

The development is being done on Gerrit here. Instructions on how to submit patches can be found here. GitHub Pull Requests are not used.