Adds the CLI-first surface for the DLNA feature
(https://github.com/gesellix/Bose-SoundTouch/discussions/213), so the
discovery/browse/play plumbing can be exercised against a real media server
and speaker without the web build loop.
- soundtouch-cli library servers: app-side SSDP sweep
(discovery.DiscoverMediaServers); --via-speaker queries the speaker's own
/listMediaServers instead, for an A/B of the two views.
- soundtouch-cli library browse --udn <id> [--object --start --count]:
dlna.Browse of a discovered server's ContentDirectory.
- soundtouch-cli library play --url <streamURL> --mode <...>: plays a track
URL on a speaker; --mode selects the playback path (local-internet-radio,
local-music, stored-music, content-item) so the best one can be found
empirically on hardware.
- pkg/client.ListMediaServers() + models.ListMediaServersResponse for the
speaker-native (Option 2) path; an empty <ListMediaServersResponse />
parses to an empty slice.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>