Allow to set icons, friendly names and UoM in config

[abinitio1980]

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Have achieved via customisations.yaml, but every time the sensors update, they revert to the defaults

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Ability to set icons, friendly names and units of measurements in the config

e.g. run_devices:

• energy_time: 2.5 entity_id: dishwasher run_before: '08:00:00' run_time: 2.5 friendly_name: 'Start Dishwasher in' unit_of_measurement: 'hours' icon: mdi:dishwasher

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have tried via customisations functionality, but although the customisations are applied (and saved) they disappear when the devices are updated

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