Garden was welded onto the notification list in CenterWidgetGroup —
always on, unrelated, stealing space from notifications that said
"Nothing". Moved it into the BottomWidgetGroup drawer as a fifth tab
alongside Calendar, To Do, Pomodoro, and Stopwatch.
CenterWidgetGroup is now just the notification list. Lens events
(note_created, synced) emit through notify-send so they land in the
notification system properly.
Forked calendar, todo, pomodoro, notifications out of ii-base into
our tree — the right sidebar no longer borrows any widget files from
ii. Toggle dialogs (bluetooth, wifi, nightLight) still symlinked as
infrastructure.
