Game of Life page element and built-in page

A new page element runs Conway's Game of Life in an area (the whole display
by default), one per page. Start: random dots, one pattern, or the icons
whose names start with a text in turn or in random order. Edges: wrap
around, dead, or a hidden margin where gliders fly out of view (leftovers
that stay put in the margin are cleared, so a glider gun runs cleanly).
It restarts when the board is still or repeats within 16 generations
and/or after a number of generations, after a hold time (an empty board
at once).

logic/life holds the board and timing (tested), display/life_player runs
the board of the shown page, ticked before each frame; frames are paced
like scrolling text. The element reuses existing fields, so the page
format stays the same. The Icons tab has a library of 17 LifeWiki
patterns (checked with a simulation), and the built-in page "Game of
Life" shuffles through the life_ icons. About 12 KB flash, 8 KB RAM.

Version 2.17.0, tested on the display over OTA.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

src/esp32/logic/builtin_pages.h

@@ -5,10 +5,13 @@
 // The original dynamic pages. display/page_store stores a copy of each at boot that can be
 // edited; the original is the fallback (deleting the copy resets the page).
 //
-//   Clock  Pikachu with the time in a thought bubble, yawning from 17:00 (the clock of
-//          the old firmware; also the default page)
+//   Clock         Pikachu with the time in a thought bubble, yawning from 17:00 (the clock
+//                 of the old firmware; also the default page)
+//   Game of Life  Conway's Game of Life on the whole display: the life_ icons (the
+//                 patterns of the Icons tab) in random order, random dots without them
 
 #define BUILTIN_PAGE_CLOCK "Clock"
+#define BUILTIN_PAGE_LIFE "Game of Life"
 
 int builtinPageCount();
 const char *builtinPageName(int index);