[Bots] Positioning rewrite (#4856)

* [Bots] Positioning rewrite

- Fixes positioning issues where bots could run back and forth or stay at the target's feet.
- Adds checks to ensure bots don't spam positioning updates and complete their initial positioning.
- Cleans up logic and makes it easier to read.

* Cleanup

zone/bot_structs.h

@@ -21,6 +21,7 @@
 
 #include "../common/types.h"
 #include "../common/timer.h"
+#include "mob.h"
 
 #include <sstream>
 
@@ -151,4 +152,39 @@ struct BotSpellTypesByClass {
 	std::string description;
 };
 
+struct CombatRangeInput {
+	Mob*                    target;
+	float                   target_distance;
+	bool                    stop_melee_level;
+	const EQ::ItemInstance* p_item;
+	const EQ::ItemInstance* s_item;
+};
+
+struct CombatRangeOutput {
+	bool  at_combat_range		= false;
+	float melee_distance_min	= 0.0f;
+	float melee_distance		= 0.0f;
+	float melee_distance_max	= 0.0f;
+};
+
+struct CombatPositioningInput {
+	Mob*	tar;
+	bool	stop_melee_level;
+	float	tar_distance;
+	float	melee_distance_min;
+	float	melee_distance;
+	float	melee_distance_max;
+	bool	behind_mob;
+	bool	front_mob;
+};
+
+struct FindPositionInput {
+	Mob*	tar;
+	float	distance_min;
+	float	distance_max;
+	bool	behind_only;
+	bool	front_only;
+	bool	bypass_los;
+};
+
 #endif // BOT_STRUCTS