* Add native Portduino mDNS discovery via Avahi and Bonjour
* Guard native discovery in Portduino WASM builds
* Add linux dependencies in packaging, support "buildroot"
Adds libavahi dependencies for Debian, RPM, Docker and CI.
Moves the libavahi definition to the shared `build_flags` (which is only consumed on Linux targets)
* Fix platformio formatting
* fix(portduino): disable Avahi when daemon unavailable
* fix(portduino): retry native discovery and defer worker logs
* fix(portduino): preserve pending discovery warnings
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Co-authored-by: Jake-B <jake-b@users.noreply.github.com>
Co-authored-by: vidplace7 <vidplace7@gmail.com>
Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
