The End gets Pokémon: a dimension zone with Cobblemon's End lines

Adrian, 2026-11-02: the End looked barren. The End is now a zone of its own
(Lv 50-70, world/zones.json -> dimensions; Zones.at returns it anywhere in the
End). tools/zone_spawns.py copies every line Cobblemon spawns in End biomes
into spawn_pool_world/the_end.json, on top of its island home: Beheeyem,
Reuniclus, Metagross; Gothitelle and Sigilyph in End cities; Malamar and
Unown with a Poke Snack. Cobblemon rolls the bucket before the Pokemon and
has these all uncommon or rare, so they move to the common bucket with even
line weights (Metagross a fifth).

Self-test end_has_spawns: the main island is in the_end and offers only End
spawns, some in the common bucket. Self-tests and the island check pass.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

world/zones.json

@@ -78,5 +78,11 @@
     {"id": "dripstone", "types": ["rock", "ground", "steel", "fairy", "psychic", "dragon"], "lines": 20, "name": "Dripstone Depths", "biome": "minecraft:dripstone_caves", "levels": [22, 38], "hazard": "none"},
     {"id": "deep_dark", "types": ["ghost", "dark", "steel", "poison", "psychic", "rock"], "guardian": {"species": "regigigas", "scale": 1.0, "drops": [["cobblemon:icy_rock", 3], ["cobblemon:exp_candy_l", 2]]}, "lines": 21, "name": "Deep Dark", "biome": "minecraft:deep_dark", "levels": [45, 60], "hazard": "darkness (vanilla sculk; no Warden)"},
     {"id": "basalt", "types": ["fire", "rock", "ground", "steel", "dark"], "guardian": {"species": "moltres", "drops": [["cobblemon:exp_candy_xl", 3], ["minecraft:netherite_scrap", 2]]}, "lines": 15, "name": "Basalt Furnace", "biome": "minecraft:basalt_deltas", "levels": [55, 70], "hazard": "heat (Cold Sweat)"}
+  ],
+  "dimensions": [
+    {"id": "the_end", "name": "The End", "dimension": "minecraft:the_end", "levels": [50, 70], "hazard": "none",
+     "biome_tags": ["#cobblemon:is_end", "#minecraft:is_end"],
+     "bucket": "common", "line_weight": 10, "rare_factor": 0.2,
+     "_comment": "Adrian, 2026-11-02: the End was barren. Every line Cobblemon spawns in End biomes spawns there too, at this band, on top of its island home (tools/zone_spawns.py). Cobblemon has them all uncommon or rare, and it rolls the bucket before the Pokemon, so they move to `bucket`; each line's heaviest entry weighs `line_weight`, Cobblemon's rare ones `rare_factor` of that."}
   ]
 }