Move the Goertzel-based CW decoder out of trx-server::decode::cw into
a dedicated src/decoders/trx-cw crate, matching the layout of trx-aprs,
trx-ft8, and trx-wspr. The decode module is now empty and removed.
- src/decoders/trx-cw/ (new — Goertzel + Morse decoder)
- trx-server: drop decode module entirely, use trx_cw::CwDecoder
- CwEvent stays in trx-core (mirrors AprsPacket / Ft8Message / WsprMessage)
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
sjgandClaude Sonnet 4.6
f4b92a0f20