Replace reference to deleted adaptive_lighting_mode_colors entity with
convention-based mode settings lookup. The blueprint now extracts led_color
from each mode's nested JSON schema (input_text.adaptive_lighting_settings_{{mode}})
instead of using a separate color mapping entity.
This fixes the error:
"ValueError: Template error: from_json got invalid input 'unknown' when
rendering template '{{ states('input_text.adaptive_lighting_mode_colors') | from_json }}'"