feat(sdr): local receivers — browser RTL-SDR, Local ADS-B layer and decoder feeds (#732)

Adds a Local ADS-B layer fed by your own receivers: a browser WebUSB
RTL-SDR (with FM listening) and local 1090/978 MHz decoder feeds
(LOCAL_RECEIVER_FEEDS, local and private addresses only). Local aircraft
draw in magenta with class, silhouettes, 3D models, trails and a position
sanity filter; the click card names the band and input that heard them.

Builds on Sameh Khamis's SDR prototype and the initial GEV port by
Mazeyar Moeini Feizabadi (#134); the decoder-feed design follows the
notes on #57. Closes #57.

Co-authored-by: Sameh Khamis <[email protected]>
Co-authored-by: Mazeyar Moeini Feizabadi <[email protected]>

src/data/lifecycle.js

@@ -16,6 +16,8 @@ const VALID_LAYER_SERIALIZATION_DISPOSITIONS = new Set([
   'enabled-only',
   'enabled+options',
   'enabled+mirrored-options',
+  // Registered but never serialized (for example hardware-local layers).
+  'local-only',
 ]);
 
 function isAbortError(error) {