Less verbose reprs for descriptors

[rytilahti]

Makes reading logs easier.

[codecov-commenter]

Codecov Report

Merging #1579 (4b1c9e9) into master (0797fc2) will decrease coverage by 0.39%.
The diff coverage is 11.49%.

@@            Coverage Diff             @@
##           master    #1579      +/-   ##
==========================================
- Coverage   81.27%   80.87%   -0.40%     
==========================================
  Files         155      156       +1     
  Lines       15176    15250      +74     
  Branches     3274     3283       +9     
==========================================
  Hits        12334    12334              
- Misses       2593     2667      +74     
  Partials      249      249              

Impacted Files	Coverage Δ
miio/devtools/simulators/miotsimulator.py	0.00% <0.00%> (ø)
miio/miot_cloud.py	0.00% <0.00%> (ø)
miio/descriptors.py	96.00% <100.00%> (ø)

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[rytilahti]

For some reason timedelta(hours=1) on datetime.now() does not change the date properly, so the tests will fail if run between 12am and 1am...

self = <DummyViomiDishwasher: 192.0.2.1 (token: ffffffffffffffffffffffffffffffff)>, time = FakeDatetime(2022, 11, 8, 0, 57), program = <Program.Quick: 2>

    @command(
        click.argument("time", type=click.DateTime(formats=["%H:%M"])),
        click.argument("program", type=EnumType(Program)),
    )
    def schedule(self, time: datetime, program: Program) -> str:
        """Schedule a program run.
    
        *time* defines the time when the program should finish.
        """
    
        if program == Program.Unknown:
            ValueError(f"Program {program.name} is not valid for this function.")
    
        now = datetime.now()
        scheduled_finish_date = now.replace(
            hour=time.hour, minute=time.minute, second=0, microsecond=0
        )
        scheduled_start_date = scheduled_finish_date - timedelta(
            seconds=program.run_time
        )
        if scheduled_start_date < now:
>           raise ValueError(
                f"Proposed time ({scheduled_start_date} < {now}) is in the past (the proposed time is the finishing time, not the start time)."
            )
E           ValueError: Proposed time (2022-11-07 00:29:05 < 2022-11-07 23:57:53.324466) is in the past (the proposed time is the finishing time, not the start time).

miio/integrations/viomidishwasher/viomidishwasher.py:336: ValueError