Release 20211220 * NixOS - point flake-registry to locol one (only use the local one to avoid network connection to download flake-registry) - remove emacs in global environment * Home Manager - replace unar with archiver - remove tigrc and tig was removed many times ago - ran as http server instead of python -m http.server - remove some useless rime config to avoid error log * Overlay - update rime-wubi86 * Emacs - insert date time with current-time-string - use undo-redo as evil undo system