Implement dashboard parsing and delivery sensors

Reads delivery day, next arrival date, both upcoming carts, box contents,
add-ons and order totals from a single /p/dashboard/details fetch. Adds five
sensors and parser tests over a synthetic fixture mirroring the live markup.

Records two portal quirks: every /p/ path returns 200 so signed-in state is
detected by a Sign Out control, and cart-contents-skipped marks the locked
cart rather than a skipped order.

custom_components/freshharvest/manifest.json

@@ -7,6 +7,6 @@
   "integration_type": "service",
   "iot_class": "cloud_polling",
   "issue_tracker": "https://git.onetick.ninja/flan/ha-freshharvest/issues",
-  "requirements": [],
+  "requirements": ["beautifulsoup4>=4.12"],
   "version": "0.1.0"
 }