mcu-lvgl-trainer, mcu-lvgl-eworkbench: migrate display to mipi_spi

qspi_dbi is deprecated in favor of mipi_spi. Also fixes
mcu-lvgl-trainer's LVGL rotation (must be set on the lvgl component,
not the display, when LVGL is in use) and its deprecated
publish_initial_state -> trigger_on_initial_state. brightness is
dropped since mipi_spi only supports it for AMOLED panels and both
devices already control backlight separately.

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

mcu-lvgl-trainer.yaml

@@ -116,8 +116,8 @@ light:
     default_transition_length: 500ms
 
 display:
-  - platform: qspi_dbi
-    model: axs15231
+  - platform: mipi_spi
+    model: AXS15231
     data_rate: 40MHz #20mhz is default
     #spi_mode: MODE2
     id: main_display
@@ -126,8 +126,6 @@ display:
       height: 480
       width: 320
     cs_pin: 45
-    brightness: 50
-    rotation: 90
     auto_clear_enabled: false
     # show_test_card: true
     # lambda: |-
@@ -187,7 +185,7 @@ binary_sensor:
   - platform: homeassistant
     id: exercise_room_light
     entity_id: light.exercise_room
-    publish_initial_state: true
+    trigger_on_initial_state: true
     on_state:
       then:
         lvgl.widget.update:
@@ -197,7 +195,7 @@ binary_sensor:
   - platform: homeassistant
     id: exercise_room_fan
     entity_id: light.mcu_dimmer_exercise_room_fan
-    publish_initial_state: true
+    trigger_on_initial_state: true
     on_state:
       then:
         lvgl.widget.update:
@@ -206,6 +204,7 @@ binary_sensor:
             checked: !lambda return x;
 
 lvgl:
+  rotation: 90
   buffer_size: 100%
   log_level: WARN
   color_depth: 16