Expose relay-indicator LEDs

The lights will be available on Home Assistant, so users will be able to set it's color and brightness, then this will be used when the relay turn on-off as the indicator for the relay status.
Resolves #57

ESPHome/TX-Ultimate-Easy-ESPHome_core.yaml

@@ -41,6 +41,15 @@ api:
     then:
       - script.execute: publish_device_info
 
+binary_sensor:
+  - id: bs_pending_restart
+    name: Pending Restart Status
+    internal: false
+    disabled_by_default: false
+    platform: template
+    entity_category: diagnostic
+    device_class: problem
+
 button:
   - id: bt_restart
     name: Restart
@@ -97,7 +106,7 @@ ota:
 
 psram:
   mode: octal
-  speed: 40MHz
+  speed: 80MHz
 
 script:
   - id: api_send_ha_event_boot
@@ -130,11 +139,24 @@ script:
       - script.execute:
           id: api_send_ha_event_boot
           type: start
+      - wait_until:
+          condition:
+            - lambda: return sl_tx_model_format->active_index().has_value();
+            - lambda: return sl_tx_model_gang->active_index().has_value();
+      - lambda: |-
+          id(is_us_model) = (sl_tx_model_format->state == "${TX_MODEL_FORMAT_US_TEXT}");
+          id(gang_count) = sl_tx_model_gang->active_index().value() + 1;
+          if (id(gang_count) < 1 || id(gang_count) > 4) {
+            ESP_LOGE("core_hw_leds", "Invalid number of gangs: %" PRIu8, id(gang_count));
+          }
 
   - id: boot_sequence
     mode: restart
     then:
       - script.execute: publish_device_info
+      - binary_sensor.template.publish:
+          id: bs_pending_restart
+          state: false
 
   - id: publish_device_info
     mode: restart
@@ -159,6 +181,9 @@ select:
     icon: mdi:tablet-cellphone
     on_value:
       then:
+        - binary_sensor.template.publish:
+            id: bs_pending_restart
+            state: true
         - lambda: |-
             id(is_us_model) = (x == "${TX_MODEL_FORMAT_US_TEXT}");
             ESP_LOGI("core", "New model selected: %s", id(is_us_model) ? "US" : "EU");
@@ -180,6 +205,9 @@ select:
     icon: mdi:dip-switch
     on_value:
       then:
+        - binary_sensor.template.publish:
+            id: bs_pending_restart
+            state: true
         - lambda: |-
             id(gang_count) = static_cast<uint8_t>(i) + 1;
             ESP_LOGI("core", "New model selected: %" PRIu8 "-%s", id(gang_count), id(gang_count) > 1 ? "Gangs" : "Gang");