Update Ecobee definitions

[sirwolfgang]

This pull request updates and expands the Ecobee-specific characteristic definitions in characteristic_types.py. The main changes include correcting UUID assignments for several thermostat characteristics, improving documentation for scheduled change time handling, and adding new characteristics for equipment status and SmartSensor data.

Updates to Ecobee characteristic UUIDs and documentation:

• Corrected UUID assignments for sleep/away heat and cool targets to match the Ecobee specification.
• Improved and clarified documentation for VENDOR_ECOBEE_NEXT_SCHEDULED_CHANGE_TIME, including details on value formats, meaning, and correct write behavior for timed holds.

New Ecobee characteristic definitions:

• Added new read-only characteristics for equipment running state, thermostat status code, and auxiliary heat activity.
• Introduced SmartSensor-specific characteristics for reporting seconds since last motion and occupancy activations.

[bdraco]

Please explain the history and how the the existing ones were incorrect

[sirwolfgang]

@bdraco I don't understand how I can explain the history, I didn't create the first version. The diff shows how they were swapped.

[bdraco]

@bdraco I don't understand how I can explain the history, I didn't create the first version. The diff shows how they were swapped.

Unfortunately without understanding why they were set to the UUIDs currently in use, I can't merge this PR because I don't know if its going to break older/different models.