Phase 8: the quest book, generated from docs/quests.yaml

- tools/quests.py writes pack/config/ftbquests/quests/ in FTB Quests 2101's
  format (data.snbt, chapters/*.snbt, texts in lang/en_us.snbt) with ids
  derived from the YAML names, so progress survives regeneration. Flexible
  progression, no lock icons, no rewards (Adrian, 2026-11-03). tools/build.py
  runs it.
- docs/quests.yaml: 18 chapters, 74 quests. Getting Started; one chapter per
  zone and the End from a zone template (reach it, catch three of its
  Pokemon, mine its ores, beat its guardian) plus chapter extras (Mire
  Waders, Eyes of Ender, Eternatus); Pokemon Machines; Base and Jobs.
- Node positions: --pull reads them from an FTB Quests folder into the
  layout block (only moved nodes); tools/prism_instance.py pulls from the
  instance before each sync and rebuilds if something moved.
- The pack's own events as hidden advancements (cobblesurvival:events/...),
  granted by QuestEvents: zone reached, guardian beaten, machine filled, End
  boss beaten.
- Self-tests quest_book_loads and quest_events_mark_zones; the guardian and
  furnace tests check their events. Self-tests and island check pass.

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

pack/config/ftbquests/quests/chapters/base.snbt

@@ -0,0 +1,50 @@
+{
+	default_hide_dependency_lines: false
+	default_quest_shape: ""
+	filename: "base"
+	group: ""
+	icon: {
+		id: "cobblemon:pasture"
+	}
+	id: "5B1F192C5A22F0B9"
+	order_index: 17
+	quest_links: [ ]
+	quests: [
+		{
+			icon: {
+				id: "cobblemon:pasture"
+			}
+			id: "3D4FF7751561B88E"
+			tasks: [
+				{
+					id: "74FA251013AB0E92"
+					item: {
+						count: 1
+						id: "cobblemon:pasture"
+					}
+					type: "item"
+				}
+			]
+			x: 0.0d
+			y: -0.75d
+		}
+		{
+			icon: {
+				id: "cobblemon:pc"
+			}
+			id: "0512AD0A323B6CBF"
+			tasks: [
+				{
+					id: "09F3BBBEAC1DAC09"
+					item: {
+						count: 1
+						id: "cobblemon:pc"
+					}
+					type: "item"
+				}
+			]
+			x: 0.0d
+			y: 0.75d
+		}
+	]
+}