build: move map & rng logic to their own libraries

Signed-off-by: NotAShelf <raf@notashelf.dev>
Change-Id: I1802469f3baff4576f61accfb5a197d86a6a6964

libs/map/map.h

@@ -0,0 +1,27 @@
+#ifndef MAP_H
+#define MAP_H
+
+#include "common.h"
+
+// Check if a tile is walkable floor
+int is_floor(const Map *map, int x, int y);
+
+// Get room center coordinates
+void get_room_center(Room *room, int *cx, int *cy);
+
+// Generate a new dungeon floor
+void dungeon_generate(Dungeon *d, Map *map, int floor_num);
+
+// Initialize map to all walls
+void map_init(Map *map);
+
+// Get a random floor tile position
+void get_random_floor_tile(Map *map, int *x, int *y, int attempts);
+
+// Visibility / Fog of War
+int is_in_view_range(int x, int y, int view_x, int view_y, int range);
+int has_line_of_sight(const Map *map, int x1, int y1, int x2, int y2);
+void calculate_visibility(Map *map, int x, int y);
+int can_see_entity(const Map *map, int from_x, int from_y, int to_x, int to_y, int range);
+
+#endif  // MAP_H