feat: Add config flow for SmartIR integration with multi-step UI wizard

- Implemented a new config flow in `config_flow.py` for SmartIR, allowing users to select platforms, controllers, and devices through a guided interface.
- Added support for new device codes in `codes_index.json` for Apton and Andersson manufacturers.
- Enhanced fan, light, and media player components to support setup from config entries.
- Introduced `strings.json` and `translations/en.json` for improved localization of the configuration steps.
- Created a tool `build_index.py` to rebuild the `codes_index.json` from individual device JSON files.
- Updated `smartir_capture.py` to handle single-code modes and excluded modes for better device configuration.
- Added `iot_class` and `config_flow` attributes in `manifest.json` to support the new configuration flow.

custom_components/smartir/media_player.py

@@ -42,6 +42,15 @@ PLATFORM_SCHEMA = PLATFORM_SCHEMA.extend({
     vol.Optional(CONF_DEVICE_CLASS, default=DEFAULT_DEVICE_CLASS): cv.string
 })
 
+
+async def async_setup_entry(hass, entry, async_add_entities):
+    """Set up SmartIR Media Player from a config entry."""
+    config = {**entry.data, **entry.options}
+    config.pop('platform', None)
+    config.setdefault('unique_id', entry.unique_id)
+    await async_setup_platform(hass, config, async_add_entities)
+
+
 async def async_setup_platform(hass, config, async_add_entities, discovery_info=None):
     """Set up the IR Media Player platform."""
     device_code = config.get(CONF_DEVICE_CODE)