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]>

package.json

@@ -47,6 +47,8 @@
     "qa:transit": "node scripts/qa-transit.mjs"
   },
   "dependencies": {
+    "@jtarrio/signals": "^0.10.0",
+    "@jtarrio/webrtlsdr": "^3.0.6",
     "@mapbox/vector-tile": "^3.0.0",
     "@meri-imperiumi/eccodes-wasm": "^2.48.2",
     "cesium": "^1.124.0",