GeezerVison

Late-import base36 and QR code libraries; remove SUPPORT_QR_CODE flag

This check was creating a lot of TimerHandles when the user
had multiple bridges. We do not need to check very often
as connections usually stay around for 24+hours

* Implement zerocopy writes for the encrypted protocol

With Python 3.12+ and later `transport.writelines` is implemented as [`sendmsg(..., IOV_MAX)`](python/cpython#91166) which allows us to avoid joining the bytes and sending them in one go.

Older Python will effectively do the same thing we do now `b"".join(...)`

* update tests

…ODE flag" (#477)

* Avoid os.chmod failing on Windows if file non-existant

* Update accessory_driver.py

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Co-authored-by: Ivan Kalchev <[email protected]>

* Address remaining pylint complaints

* Address remaining pylint complaints