Add OWON SDS1104 oscilloscope driver

[kerby2000]

Summary

This PR adds support for the OWON SDS1104 oscilloscope family over raw USB.

The driver is based on stable behavior verified against a compatible
HANMATEK DOS1104 unit on the same hardware family.

Included changes

• add instruments.owon.OWONSDS1104
• add package exports and API reference docs for instruments.owon
• add a minimal example script
• add raw USB binary helpers needed for the SDS1104 USB transport
• add transcript-based unit tests for text, binary, waveform, BMP,
  deep-memory, saved-waveform, and trigger paths

Public API scope

The initial public API includes:

• run/stop control
• channel display, coupling, probe attenuation, scale, offset, position, invert
• acquisition mode, averages, memory depth, timebase scale, horizontal offset
• trigger status, trigger mode, and edge-trigger source/coupling/slope/level
• autoscale action
• scalar measurement helpers
• measurement blob reads
• screen waveform retrieval and waveform metadata
• BMP screen capture
• deep-memory capture
• saved-waveform index and raw data access

Notes

The SDS1104 family uses a prompt-style raw USB text path and binary packet
transfers rather than newline-terminated USB text replies, so the driver uses
small USB communicator extensions for packet and binary reads.

Memory-depth support is intentionally conservative. Broader family documents
list higher depths, but compatibility hardware used for validation appears
capped at 20K record length.

A small deterministic timeout fix in the ThorLabs APT abstract base is also
included because broader validation exposed a zero-timeout edge case in the
existing suite.

Testing

I ran:

python -m pytest tests/test_owon/test_sds1104.py tests/test_comm/test_usb_communicator.py tests/test_tektronix/test_tektronix_tds224.py tests/test_rigol/test_rigolds1000.py tests/test_package.py -q
python -m pytest -q
python -m pylint src/instruments/owon/sds1104.py src/instruments/abstract_instruments/comm/usb_communicator.py
python -m black --check src/instruments/owon/sds1104.py tests/test_owon/test_sds1104.py