Feature: Recommend cheapest start time for appliance based on energy rates and smart plug usage

[chickenonaraft88]

Description

Create a Home Assistant add-on feature that recommends the cheapest time to start a specific appliance by combining:

1. Configurable energy rate entity
2. Configurable smart plug energy usage entity

Requirements

• Accept two Home Assistant entities as configuration options:
  • Energy rates entity
  • Smart plug energy usage entity
• Use the smart plug data to determine how much energy the appliance consumes and how long it runs
• Analyze the rates for the current day and identify the best hour to start the appliance to minimize cost
• Provide a recommendation output for the cheapest start time based on estimated usage and rate schedule

Notes

This issue is the next step after initial add-on setup and should extend the add-on logic to consume Home Assistant entity data and calculate cost-optimized scheduling.