Add clock, forecast, graph, sun, timer and person cards with wide tiles

Any tile can now be double width: pack() in runtime_model.h places wide
tiles in the left column and the manager preview follows the same rules.
New cards: built-in clock (digital or analog, screen.clock), five-day
weather forecast on a wide weather card fed by weather.get_forecasts,
history sparkline for sensors, sunrise/sunset (sun.sun), live kitchen
timer (timer.*, tap starts or pauses) and presence (person.*). The
manager pre-computes time-zone and forecast extras in a new 'x' object
and refuses layouts with new domains until the screen runs 0.2.14.

The self-test follows the packing, checks custom card parts and wide
widths, and diagnostics/send_layout.py pushes a demo layout of every
card type for render checks without Home Assistant. App 0.2.12,
firmware 0.2.14.

Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>

screen_manager/config.yaml

@@ -1,5 +1,5 @@
 name: ESP Screen Manager
-version: "0.2.11"
+version: "0.2.12"
 slug: esp_screen_manager
 description: Kies tegels voor je CYD en Guition touchscreen, zonder opnieuw flashen.
 url: https://github.com/MaxGramser/homeassistant_espscreen