[QHC-730] Implement platform.session() context manager

[fedonman]

• Introduced a robust context manager platform.session() for managing platform lifecycle operations. The manager automatically calls platform.connect(), platform.initial_setup(), and platform.turn_on_instruments() to set up the platform environment before experiment execution. It then ensures proper resource cleanup by invoking platform.turn_off_instruments() and platform.disconnect() after the experiment, even in the event of an error or exception during execution. If multiple exceptions occur during cleanup (e.g., failures in both turn_off_instruments() and disconnect()), they are aggregated into a single ExceptionGroup (Python 3.11+) or a custom exception for earlier Python versions.

  Example:

  with platform.session():
  # do stuff...

[linear[bot]]

QHC-730 Implement the `platform.session()` context manager

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 96.87500% with 1 line in your changes missing coverage. Please review.

Project coverage is 95.88%. Comparing base (c843dfc) to head (2d1196d). Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
src/qililab/exceptions/exception_group.py	85.71%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #792 +/- ## ======================================= Coverage 95.87% 95.88% ======================================= Files 272 273 +1 Lines 8973 9005 +32 ======================================= + Hits 8603 8634 +31 - Misses 370 371 +1 ``` | [Flag](https://app.codecov.io/gh/qilimanjaro-tech/qililab/pull/792/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qilimanjaro-tech) | Coverage Δ | | |---|---|---| | [unittests](https://app.codecov.io/gh/qilimanjaro-tech/qililab/pull/792/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qilimanjaro-tech) | `95.88% <96.87%> (+<0.01%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=qilimanjaro-tech#carryforward-flags-in-the-pull-request-comment) to find out more.

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