Initial import: fast_dual_ws (renamed to fhd_fast_tri_ws)

FAST-LIVO2 dual/triple-camera VIO-LIO mapping workspace (ROS2 Humble),
including the N-camera port from Omni-LIVO, rpg_vikit multi-camera
parameter loader, and the um982_driver/gnss_comm packages staged here
ahead of RTK fusion work.

FAST-LIVO2 and rpg_vikit were previously separate git clones tracking
their own GitHub history (Robotic-Developer-Road org, humble/main
branches) — that history is preserved locally in
src/{FAST-LIVO2,rpg_vikit}/.git-github-backup (not pushed here) and
these two are now tracked flat as part of this repo going forward.

src/FAST-LIVO2/config/camera_mid360s.yaml

@@ -0,0 +1,37 @@
+/**:
+  ros__parameters:
+    cam_model: Pinhole
+    # 카메라: MVS BinningHorizontal=2, BinningVertical=2 → 720x540 출력
+    # scale=1.0 (하드웨어 binning이 이미 해상도 축소)
+    cam_width: 720
+    cam_height: 540
+    scale: 1.0
+    # --- 8mm lens v4, 720x540 binning 2x2 (1440x1080 × 0.5) ---
+    cam_fx: 1173.519316
+    cam_fy: 1176.587995
+    cam_cx: 395.975479
+    cam_cy: 283.304207
+    cam_d0: -0.128253
+    cam_d1: 0.437160
+    cam_d2: 0.002047
+    cam_d3: 0.007568
+    # --- 8mm lens v4, 1440x1080 + software scale=0.5 (binning 미지원 시 대안) ---
+    # cam_width: 1440
+    # cam_height: 1080
+    # scale: 0.5
+    # cam_fx: 2347.038631
+    # cam_fy: 2353.175990
+    # cam_cx: 791.950958
+    # cam_cy: 566.608413
+    # --- 6mm lens, 1440x1080 + scale=0.5 ---
+    # cam_width: 1440
+    # cam_height: 1080
+    # scale: 0.5
+    # cam_fx: 1731.285808
+    # cam_fy: 1739.429604
+    # cam_cx: 713.349417
+    # cam_cy: 547.551014
+    # cam_d0: -0.091047
+    # cam_d1: 0.101541
+    # cam_d2: -0.001141
+    # cam_d3: -0.001854