The script used to identify and update the change is added into the GitHub
workflows script directory. A workflow action can be created to trigger the
script to update the headers on the first of every new year. Possibly a task for
a consequent PR.
Ideally it would be great to implement tabs switch with C-tab (or C-}) that
shows the tabs as long as C is pressed. However Emacs does not support key
release events so this function uses a timer as a workaround.
To me Emacs looks better when tabs are hidden, and also packages like
pdf-continuous-scroll-mode break when tabs are shown.