Add possibility to enable/disable Energy Saver Mode AC

[Testmangh]

Is your feature request related to a problem? Please describe.
No

Describe the solution you'd like
Be able to enable and disable energy saver mode for air conditioners

Describe alternatives you've considered

Additional context
Today I only use LGThinq app because of this feature if your integration had it I would stop using LGThinq immediately.

[manroca]

I agree, having the possibility to control the energy saver mode from home assistant would be great. It's the only reason to use the LG app.

[ostracizado]

Would be great to add Energy Saving & Silence.
Kind of weird that the device itself doesn't stay on those modes after turning off and on...

As the device turns Off when I'm away, and turns On when I return; for know, I guess, I'll have to use a combination of that and an automation cloning the IR remote's commands (ex: broadlink) to automatically set both settings every time it turns on.

[ldotlopez]

+1 to this

Also, to clarify, my AC unit ('RAC_056905_WW-RAC', firmware 'clip_hna_v1.9.188') has two energy saving modes:

A. I can cycle thru 100%, 80%, 60% and 40% power. Not available thru the app, only via the remote.
B. My unit also has the "night mode" which lowers fan (¿silence?) and consumption. Available thru the app in the☽ (moon) menu and via the remote with the ☆ (star) timer.

The first one can be implemented with a choice selector (like fan speeds) and the seconds as a switch.

I can see some references in the device json:

• airState.rac.addFunc: ENERGYSAVING,
• airState.opMode: @AC_MAIN_OPERATION_MODE_ENERGY_SAVING_W
• airState.smartCare.status": @AC_SMARTCARE_STATUS_PLEASANT_W, @AC_SMARTCARE_STATUS_SAVING_W