feat(logging): add spdlog backend behind ICEBERG_SPDLOG (5/6)#726

kamcheungting-db wants to merge 7 commits into

apache:mainapache/iceberg-cpp:mainfrom

kamcheungting-db:logging-block5-spdlogkamcheungting-db/iceberg-cpp:logging-block5-spdlogCopy head branch name to clipboard