Adds new integration [grotan1/denon-avr-3805] (#4294)

* Add grotan1/denon-avr-3805 integration

- Home Assistant integration for Denon AVR-3805 receivers
- Provides media player functionality via serial/TCP connection
- Supports 26 languages with consistent English entity names
- HACS ready with proper structure and validation
- Placed in correct alphabetical order

* Fix sort order

---------

Co-authored-by: Joakim Sørensen <joasoe@proton.me>

integration

@@ -640,6 +640,7 @@
   "gregoryduckworth/GoogleGeocode-HASS",
   "grimmpp/home-assistant-eltako",
   "gritaro/gigachain",
+  "grotan1/denon-avr-3805",
   "gtjadsonsantos/consul",
   "gtjadsonsantos/controlid",
   "gtjadsonsantos/vapix",
@@ -1709,4 +1710,4 @@
   "zubir2k/homeassistant-esolatgps",
   "zubir2k/homeassistant-esolattakwim",
   "zulufoxtrot/ha-zyxel"
-]
+]