Add bintime submodule

[bkeryan]

• This contribution adheres to CONTRIBUTING.md.

What does this Pull Request accomplish?

Add the nitypes.bintime module, which implements binary time types using NI Binary Time Format (NI-BTF).

TODO in this PR:

• Write tests for nitypes.time._conversion bintime support

Subsequent PRs:

• AB#3137071 - Add conversion between the NumPy and Python representations
• AB#3094390 - Define NI-BTF waveform timing object

Why should this Pull Request be merged?

Closes AB#3066180 - Define Python NI-BTF (Binary Time Format) time data type

What testing has been done?

• Ran unit tests
• Checked coverage for gaps

[github-actions]

Test Results

    12 files  ±    0      12 suites  ±0   55s ⏱️ +17s
 1 205 tests +  353   1 197 ✅ +  345   8 💤 + 8  0 ❌ ±0 
14 328 runs  +4 104  14 232 ✅ +4 008  96 💤 +96  0 ❌ ±0 

Results for commit a9488a4. ± Comparison against base commit 8e0f545.

♻️ This comment has been updated with latest results.

[csjall]

Approved pending missing TODO items

[bkeryan]

The tests are failing on Python 3.9:

________ ERROR collecting tests/unit/waveform/_timing/test_precision.py ________
tests/unit/waveform/_timing/test_precision.py:11: in <module>
    from nitypes.waveform import PrecisionTiming, SampleIntervalMode
src/nitypes/waveform/__init__.py:104: in <module>
    from nitypes.waveform._analog import AnalogWaveform
src/nitypes/waveform/_analog.py:12: in <module>
    from nitypes.waveform._numeric import NumericWaveform, _TOtherScaled
src/nitypes/waveform/_numeric.py:33: in <module>
    from nitypes.waveform._timing import BaseTiming, PrecisionTiming, Timing, convert_timing
src/nitypes/waveform/_timing/__init__.py:4: in <module>
    from nitypes.waveform._timing._conversion import convert_timing
src/nitypes/waveform/_timing/_conversion.py:12: in <module>
    from nitypes.time._conversion import convert_datetime, convert_timedelta
src/nitypes/time/__init__.py:3: in <module>
    from nitypes.time._conversion import convert_datetime, convert_timedelta
src/nitypes/time/_conversion.py:11: in <module>
    import nitypes.bintime as bt
src/nitypes/bintime/__init__.py:74: in <module>
    from nitypes.bintime._datetime import DateTime
src/nitypes/bintime/_datetime.py:11: in <module>
    from nitypes.bintime._timedelta import (
src/nitypes/bintime/_timedelta.py:42: in <module>
    class TimeDelta:
src/nitypes/bintime/_timedelta.py:102: in TimeDelta
    def _(cls, seconds: SupportsIndex) -> int:
/opt/hostedtoolcache/Python/3.9.22/x64/lib/python3.9/functools.py:933: in register
    return self.dispatcher.register(cls, func=method)
/opt/hostedtoolcache/Python/3.9.22/x64/lib/python3.9/functools.py:870: in register
    argname, cls = next(iter(get_type_hints(func).items()))
/opt/hostedtoolcache/Python/3.9.22/x64/lib/python3.9/typing.py:1497: in get_type_hints
    value = _eval_type(value, globalns, localns)
/opt/hostedtoolcache/Python/3.9.22/x64/lib/python3.9/typing.py:292: in _eval_type
    return t._evaluate(globalns, localns, recursive_guard)
/opt/hostedtoolcache/Python/3.9.22/x64/lib/python3.9/typing.py:554: in _evaluate
    eval(self.__forward_code__, globalns, localns),
<string>:1: in <module>
    ???
E   NameError: name 'SupportsIndex' is not defined

This looks like the issue described in python/cpython#86153 .