fp: Add a simplified swarming algorithm

feely_pona_game.h

@@ -80,8 +80,14 @@ enum FP_GameDirection
     FP_GameDirection_Count,
 };
 
+enum FP_GameWaypointFlag
+{
+    FP_GameWaypointFlag_NonInterruptible = 1 << 0,
+};
+
 struct FP_GameWaypoint
 {
+    uint32_t              flags;
     FP_GameWaypointType   type;
     FP_GameDirection      type_direction; // Used if type is `FP_GameWaypointType_Side`
     FP_GameEntityHandle   entity;         // The entity to move to
@@ -122,12 +128,6 @@ struct FP_GameRenderSprite
     uint64_t                 started_at_clock_ms;
 };
 
-struct FP_GameSwarm
-{
-    Dqn_FArray<FP_SentinelList<FP_GameEntityHandle>, 8> slots;
-    Dqn_usize                                           slots_active;
-};
-
 struct FP_GameEntity
 {
     FP_GameEntity                         *next;
@@ -153,7 +153,6 @@ struct FP_GameEntity
 
     FP_SentinelList<FP_GameWaypoint>      waypoints;
     FP_GameEntityHandle                   aggro_slot[FP_GameDirection_Count];
-    FP_GameSwarm                          swarm[FP_GameDirection_Count];
 
     // NOTE: The entity hit box is positioned at the center of the entity.
     Dqn_V2                                local_hit_box_size;