update: release after version bumps

improve: add commandline options for --version and --help

improve: error checking, bump deps

shore: minor code cleanup

add: golangci-linter, minor code cleanups, improve error checks, bump…

… deps

improve: codequality, makefiles, dependency handling

release

bugfix: webui table glitch

improve: unifi webui, add asset tag, update docu

add: unifi inventory database export and archive