Beta Firmware Switch (#186)

* Add Beta Firmware Switch

* Make LINT happy

home-assistant-voice.factory.yaml

@@ -52,3 +52,19 @@ esp32_improv:
   on_stop:
     - lambda: id(improv_ble_in_progress) = false;
     - script.execute: control_leds
+
+switch:
+  - platform: template
+    id: beta_firmware
+    name: Beta firmware
+    icon: "mdi:test-tube"
+    disabled_by_default: true
+    entity_category: diagnostic
+    optimistic: true
+    restore_mode: RESTORE_DEFAULT_OFF
+    on_turn_on:
+      - logger.log: "OTA updates set to use Beta firmware"
+      - lambda: id(update_http_request).set_source_url("https://firmware.esphome.io/home-assistant-voice-pe/home-assistant-voice/manifest-beta.json");
+    on_turn_off:
+      - logger.log: "OTA updates set to use Production firmware"
+      - lambda: id(update_http_request).set_source_url("https://firmware.esphome.io/home-assistant-voice-pe/home-assistant-voice/manifest.json");