git-tools.kak: Add a 'git hide-blame' command

rc/git-tools.kak

@@ -103,6 +103,7 @@ def -shell-params \
     case "$1" in
        show|log|diff|status) show_git_cmd_output "$@" ;;
        blame) run_git_blame ;;
+       hide-blame) echo "try %{ rmhl hlflags_git_blame_flags }" ;;
        show-diff)
            echo "try %{ addhl flag_lines black git_diff_flags }"
            update_diff
@@ -122,5 +123,4 @@ def -shell-params \
            ;;
        *) echo "echo -color Error %{unknown git command '$1'}"; exit ;;
     esac
-
 }}