Initial commit: offline flight planner (Rust, PFPX-class)

Clean-room reproduction of PFPX: route generation + IFPS validation + OFP.
Independent design — official ICAO/EUROCONTROL data only (RAD, FRA points,
IFPUV oracle); no community FPL sources.

Workspace crates: core (routing/discover/rad/navdata/perf/export),
cli, server, rad (Annex parser), gui (Tauri v2 + React + MapLibre).
Route discovery: oracle-in-the-loop repair against Eurocontrol IFPUV.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

crates/core/tests/fixtures/earth_awy.dat

@@ -0,0 +1,8 @@
+I
+1100 Version - test fixture, not real navdata
+
+ABEAM LF 11 BEACN LF 11 N 1  35 245 T100
+BEACN LF 11 CROSS LF 11 N 1  35 245 T100
+CROSS LF 11 DOVER EG 11 N 2 245 460 U200
+DOVER EG 11 ENTRY EG 11 N 2 245 460 U200
+99