F10 overlay: expose Game.NoHitFlash and Game.SkipIntro toggles (#78)

The two user-facing config keys were registered but only reachable by
hand-editing ge007.ini. Add ROW_TOGGLE rows (below Screen shake):

- No hit flash  (D232, community "no damage flash"; suppresses the
  non-black fade paths in bondview2)
- Skip intro    (D216; read at title-stage load, so it takes effect the
  next time the title screen is reached)

Video.FixMipTextures / Video.WrapFix deliberately left out: opt-in
fidelity bug-fixes, not preferences.

Verified live (isolated CWD): both rows render in the F10 panel and
toggle; clean exit persists Game.NoHitFlash=1 + Game.SkipIntro=1 to
ini; relaunch with SkipIntro=1 logs "Game.SkipIntro: booting to
file-select" and skips straight to mission select. NoHitFlash's
in-game suppression rests on its prior D232 verification (needs
combat, not automatable).

port/src/optionsoverlay.c

@@ -124,6 +124,12 @@ static struct Row rows[] = {
     { "Input.SensLink",           "Link aim/turn sens",ROW_TOGGLE, 1,   kOnOff,     0, 0, 0,   0,0,0,0,0 },
     { "Input.MouseInvertY",       "Mouse invert Y",   ROW_TOGGLE, 1,    kOnOff,     0, 0, 0,   0,0,0,0,0 },
     { "Game.ScreenShakeIntensity","Screen shake",     ROW_SLIDER, 0.25, NULL,       0, 0, 3,   0,0,0,0,0 },
+    /* D232: the community "no damage flash" toggle (suppresses the red/green
+     * hit-flash overlay in bondview2). */
+    { "Game.NoHitFlash",          "No hit flash",     ROW_TOGGLE, 1,    kOnOff,     0, 0, 0,   0,0,0,0,0 },
+    /* D216: read once at title-stage load (lv.c) -- toggling it takes effect
+     * the next time the title screen is reached. */
+    { "Game.SkipIntro",           "Skip intro",       ROW_TOGGLE, 1,    kOnOff,     0, 0, 0,   0,0,0,0,0 },
 };
 #define NUM_ROWS ((int)(sizeof(rows) / sizeof(rows[0])))