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/CIFP/EGLL.dat

@@ -0,0 +1,2 @@
+RWY:RW09L,     ,      ,00079, ,   ,3,   ;N51285200,W000273600,0000;
+RWY:RW27R,     ,      ,00078, ,   ,3,   ;N51284900,W000260900,0000;

crates/core/tests/fixtures/CIFP/LFPG.dat

@@ -0,0 +1,2 @@
+RWY:RW08L,     ,      ,00338, ,GLE ,3,   ;N48594447,E002330988,0000;
+RWY:RW26R,     ,      ,00318, ,GAU ,3,   ;N48595395,E002360724,1725;