Refactor code structure for improved readability and maintainability

esphome/common/sensor/debug_sensor.config.yaml

@@ -0,0 +1,10 @@
+sensor:
+  - platform: debug
+    free:
+      name: "Heap Free"
+      id: heap_free_sensor
+      entity_category: diagnostic
+    loop_time:
+      name: "Loop Time"
+      id: loop_time_sensor
+      entity_category: diagnostic

esphome/common/sensor/rssi_sensor.config.yaml

@@ -8,6 +8,7 @@ sensor:
 
   - platform: copy # Reports the WiFi signal strength in %
     source_id: local_wifi_signal_db
+    id: local_wifi_signal_percent
     name: "WiFi Signal Strength"
     filters:
       - lambda: return min(max(2 * (x + 100.0), 0.0), 100.0);