Show the screens and ESP Screens in the README; firmware 0.2.35 to test updates (0.2.41)

- README: photos of a Guition at home, both boards with demo layouts, a card gallery,
  the alert with the Alerts cheatsheet, New screen and choosing tiles, tile settings next
  to the resulting tile, and the top bar sheet. Screen images are rendered from the
  firmware's own LVGL code (ESPHome host + SDL) fed by the app's own messages on a demo home.
- App store page (screen_manager/README.md): a photo and the editor via absolute URLs.
- Firmware 0.2.35 only raises SCREEN_FIRMWARE_VERSION so the update path can be tested.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

screen_manager/app/core.py

@@ -17,7 +17,7 @@ WEEKDAYS = ['Mo', 'Tu', 'We', 'Th', 'Fr', 'Sa', 'Su']
 REPO = 'https://github.com/MaxGramser/homeassistant_espscreen'
 REFS = {'cyd': 'main', 'guition': 'main'}
 # Firmware shipped with this app release; screens below it get an update offer.
-FIRMWARE_VERSION = '0.2.34'
+FIRMWARE_VERSION = '0.2.35'
 ATTRS = frozenset('brightness percentage current_position current_temperature temperature current_humidity min_temp max_temp target_temp_step supported_color_modes hvac_modes hvac_action hs_color color_temp_kelvin min_color_temp_kelvin max_color_temp_kelvin fan_speed_list unit_of_measurement battery_level fan_speed volume_level is_volume_muted media_title options min max step temperature_unit supported_features device_class next_rising next_setting finishes_at duration remaining humidity wind_speed wind_speed_unit apparent_temperature fan_modes swing_modes fan_mode swing_mode'.split())
 # Attributes whose boolean value the screen needs; every other bool stays behind.
 BOOL_ATTRS = frozenset(['is_volume_muted'])