[lvgl] Allow a binary sensor to report checked or pressed state (#16073)

Co-authored-by: J. Nick Koston <nick+github@koston.org>

tests/components/lvgl/lvgl-package.yaml

@@ -16,10 +16,19 @@ binary_sensor:
     platform: template
   - id: left_sensor
     platform: template
+  - platform: lvgl
+    name: Button A pressed
+    widget: button_a
+    state: pressed
+  - platform: lvgl
+    name: Button A checked
+    widget: button_a
+    state: checked
   - platform: lvgl
     id: button_checker
     name: LVGL button
     widget: button_button
+    state: checked
     on_state:
       then:
         - lvgl.checkbox.update:
@@ -29,6 +38,12 @@ binary_sensor:
                   auto y = x; // block inlining of one line return
                   return y;
 
+  - platform: lvgl
+    id: button_presser
+    name: Button pressed
+    widget: button_button
+    state: pressed
+
 lvgl:
   id: lvgl_id
   rotation: 90