docs: acknowledge Home Assistant in README (EN/ES) (#20)

Co-authored-by: gnacho <hnacho@proton.me>

Author: gnacho

README.es.md

@@ -135,6 +135,14 @@ Inversores (Solis/Fox) ──integraciones──▶ HAOS ──WebSocket──
 - Actualizar = desplegar el build nuevo y reiniciar el servicio; la BD y
   el `.env` (`/opt/helios/`) sobreviven siempre.
 
+## Gracias enormes
+
+Helios no existiría sin [Home Assistant](https://www.home-assistant.io/).
+Él hace la parte difícil: hablar con los inversores, gestionar sus
+reconexiones y exponer sensores limpios. Helios se limita a leer lo que HAOS
+ya recoge. Si este proyecto te sirve, el mérito real es de la gente que
+mantiene Home Assistant en marcha.
+
 ## Licencia
 
 AGPL-3.0 — ver [LICENSE](LICENSE).

README.md

@@ -135,6 +135,14 @@ Inverters (Solis/Fox) ──integrations──▶ HAOS ──WebSocket──▶
 - Update = deploy the new build and restart the service; the DB and the
   `.env` (`/opt/helios/`) always survive.
 
+## Big thanks
+
+Helios wouldn't exist without [Home Assistant](https://www.home-assistant.io/).
+It already does the hard part: talking to the inverters, handling their
+reconnects, and exposing clean sensors. Helios just reads what HAOS already
+collects. If this project is useful to you, the real credit goes to the people
+who keep Home Assistant running.
+
 ## License
 
 AGPL-3.0 — see [LICENSE](LICENSE).