docs(mystery): Phase 2 content-rewrite roadmap

Workflow guide for authoring the bible into markdown now that engine
prereqs have shipped. Suggests slicing by region rather than by kind so
each PR produces a playable surface.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

src/world/.obsidian/graph.json

@@ -1,11 +1,22 @@
 {
+  "collapse-filter": false,
+  "search": "",
   "showTags": false,
   "showAttachments": false,
+  "hideUnresolved": false,
   "showOrphans": true,
-  "collapse-filter": false,
   "collapse-color-groups": false,
+  "colorGroups": [],
   "collapse-display": false,
-  "collapse-forces": false,
+  "showArrow": false,
+  "textFadeMultiplier": 0,
+  "nodeSizeMultiplier": 1.2,
   "lineSizeMultiplier": 1,
-  "nodeSizeMultiplier": 1.2
-}
+  "collapse-forces": false,
+  "centerStrength": 0.518713248970312,
+  "repelStrength": 10,
+  "linkStrength": 1,
+  "linkDistance": 250,
+  "scale": 2.25,
+  "close": true
+}