Add Fresh Harvest integration scaffold

Implements the freshharvest.com two-step login handshake, config flow,
6-hour polling coordinator, and four delivery sensors. Portal page parsing
is not implemented; async_get_next_delivery raises until the account HTML
is mapped against a signed-in session.

custom_components/freshharvest/__init__.py

@@ -0,0 +1,40 @@
+"""The Fresh Harvest integration."""
+
+from __future__ import annotations
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import CONF_EMAIL, CONF_PASSWORD, Platform
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.aiohttp_client import async_create_clientsession
+
+from .api import FreshHarvestClient
+from .coordinator import FreshHarvestCoordinator
+
+PLATFORMS: list[Platform] = [Platform.SENSOR]
+
+type FreshHarvestConfigEntry = ConfigEntry[FreshHarvestCoordinator]
+
+
+async def async_setup_entry(
+    hass: HomeAssistant, entry: FreshHarvestConfigEntry
+) -> bool:
+    """Set up Fresh Harvest from a config entry."""
+    # Dedicated session: the login tokens are bound to its cookie jar.
+    session = async_create_clientsession(hass)
+    client = FreshHarvestClient(
+        session, entry.data[CONF_EMAIL], entry.data[CONF_PASSWORD]
+    )
+
+    coordinator = FreshHarvestCoordinator(hass, entry, client)
+    await coordinator.async_config_entry_first_refresh()
+    entry.runtime_data = coordinator
+
+    await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
+    return True
+
+
+async def async_unload_entry(
+    hass: HomeAssistant, entry: FreshHarvestConfigEntry
+) -> bool:
+    """Unload a config entry."""
+    return await hass.config_entries.async_unload_platforms(entry, PLATFORMS)