Add in-game HUD options menu (Shift+H)

Introduces a two-column overlay menu toggled with Shift+H or Esc, allowing players to enable/disable individual HUD elements without leaving the game. Replaces the previous all-or-nothing HUD toggle.

Registers dedicated CVars for all HUD elements (CVAR_ARCHIVE)
Redundant CVars removed in favour of native ones (cg_drawRearView, cg_drawMMap, cg_derbyHitFxEnable)
Checkpoint Arrow cycles through all three states: Off / On HUD / Above Car
Derby and Scores Panel entries are greyed out and non-interactive when not applicable to the current game type
Fuel Gauge follows Speedometer (no separate toggle needed)
Menu input is isolated from the game: Shift+H sets KEYCATCH_CGAME, preventing chat and other binds from firing while the menu is open
Cursor rendered via menu/art/3_cursor2; mouse click toggles entries directly
Layout: 560px wide panel, two columns (Racing left, Derby/Vehicle right), BIGCHAR title, TINYCHAR hint, uniform badge width for clean alignment
Refactored from monolithic cg_rally_hud.c/.c2 into cg_hud_core.c, cg_hud_racing.c, cg_hud_derby.c, cg_hud_vehicle.c

Author: Perle2212

engine/Makefile

@@ -2729,8 +2729,10 @@ Q3CGOBJ_ = \
   $(B)/$(BASEGAME)/cgame/cg_predict.o \
   $(B)/$(BASEGAME)/cgame/cg_rally_draw.o \
   $(B)/$(BASEGAME)/cgame/cg_rally_drawtools.o \
-  $(B)/$(BASEGAME)/cgame/cg_rally_hud.o \
-  $(B)/$(BASEGAME)/cgame/cg_rally_hud2.o \
+  $(B)/$(BASEGAME)/cgame/cg_hud_core.o \
+  $(B)/$(BASEGAME)/cgame/cg_hud_racing.o \
+  $(B)/$(BASEGAME)/cgame/cg_hud_derby.o \
+  $(B)/$(BASEGAME)/cgame/cg_hud_vehicle.o \
   $(B)/$(BASEGAME)/cgame/cg_rally_platetools.o \
   $(B)/$(BASEGAME)/cgame/cg_rally_racetools.o \
   $(B)/$(BASEGAME)/cgame/cg_rally_rearweapons.o \

engine/code/cgame/cg_draw.c

@@ -25,6 +25,7 @@ Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 // active (after loading) gameplay
 
 #include "cg_local.h"
+#include "cg_hud_elements.h"
 
 #ifdef MISSIONPACK
 #include "../ui/ui_shared.h"
@@ -3168,6 +3169,7 @@ static void CG_DrawIntermission( stereoFrame_t stereoFrame ) {
 
 // Q3Rally Code Start
 	cg.scoreBoardShowing = CG_DrawHUD();
+	CG_DrawHUDOptionsMenu();
 
 	if ( stereoFrame == STEREO_CENTER ) {
 		CG_JukeboxFrame();
@@ -3510,7 +3512,7 @@ static void CG_Draw2D(stereoFrame_t stereoFrame)
 	CG_DrawFollow();
 
 	cg.scoreBoardShowing = CG_DrawHUD();
-
+	CG_DrawHUDOptionsMenu();
 
 	// don't draw center string if scoreboard is up