Add overlays to the Deep End map

Mentioned in #86

> Bosses:
840; -1509 friendship
4350; 870 squid
-4845; 870 alchemist
9977; -800 pyramid
-13675; 140 deer
6910; 13567 meat
2333; 12059 dragon
-12035; 13170 forgotten
12560; 15270 master masteri
14080; 11055 robo
2825; 38715 triangle
3550; 40160 kolmi
tiny maggot, big fish (leviathan), qivi - hidden bosses needs switch game to NG+ (fish) or NG- (tiny)
toveri rare event boss - with a small chance spawns at start
2 orbs changed positions:
-3840; 16245 Spiral Shot spell
-260; 43370 Fireworks spell

No files or tests are referenced; first inspect the repository for where Deep End overlay/marker data is defined in the map frontend. Check issue #86 for expected context, then follow the existing boss/spell marker format and add the listed coordinates and names, including the NG+ / NG- hidden-boss notes and the two orb spell location updates. Completion is when the Deep End map view shows all requested bosses/orbs at those coordinates.

Scritto dal modello di indicizzazione a partire dal testo della issue.