Non-graphical access to frame-local tabs (named window configurations)

Non-graphical access to frame-local tabs (named window configurations)

* lisp/tab-bar.el (make-tab, delete-tab, tab-bar-list)
(tab-bar-list-next-line, tab-bar-list-prev-line)
(tab-bar-list-unmark, tab-bar-list-backup-unmark)
(tab-bar-list-delete, tab-bar-list-delete-backwards)
(tab-bar-list-execute, tab-bar-list-select)
(tab-bar-list-mouse-select): New commands.
(tab-bar-list-noselect, tab-bar-list-current-tab)
(tab-bar-list-delete-from-list): New functions.
(tab-bar-list-column): New defvar.