* test(stream-gears): pytest smoke suite for the wheel in CI
Offline checks against the installed wheel: exported names, UploadLine
members, PySegment/config_bindings basics, `biliup --version` and
`python -m biliup --help` in a subprocess. OPS-19 (login functions
require `proxy`) is recorded as a strict xfail.
The linux x86_64 job installs the abi3 wheel into a venv and runs the
suite before the free-threaded build.
Ref #1721
* chore(stream-gears): move manual scripts to examples/
Drop test_server.py (only printed the default config; now covered by
the smoke suite). Move login.py, test_upload.py and test_download.py to
examples/ so pytest never collects them, and take the video/cookie
paths and stream URL from argv/env instead of hard-coded E:\ paths.
Also pass proxy explicitly (OPS-19), use PySegment (OPS-20) and catch
ValueError from str.index (OPS-38) so the scripts run on this version.
Ref #1721
* test(stream-gears): drop internal bug id from xfail reason