feat(docs): restructure wiki taxonomy with templates and Krenn System entry (#301, #319)

Move wiki from docs/wiki/ to root wiki/. Add 14 category templates with
YAML frontmatter, governance model, hierarchical spatial structure
(system > station > district > location). Populate Krenn System entry
as first concrete star system. Update cross-references in workshop and
sprint docs.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

docs/design/npc-patterns/the-mirror.md

@@ -626,7 +626,7 @@ In a world where everyone is hiding something, the one person who isn't becomes
 **End Pattern Specification.**
 
 **Files referenced:**
-- `/var/home/jeroenschweitzer/Projects/settled-reach/copy/docs/wiki/npcs/naia-tamm.md` — Reference implementation
+- `/var/home/jeroenschweitzer/Projects/settled-reach/copy/wiki/npcs/naia-tamm.md` — Reference implementation
 - `/var/home/jeroenschweitzer/Projects/settled-reach/copy/decisions/content.md` — D-024 (10-axis model), D-028 (dialogue architecture), D-029 (entanglement ratio), D-032 (separate monologue pools), D-034 (THE FRIEND pattern), D-035 (tag taxonomy)
 - `/var/home/jeroenschweitzer/Projects/settled-reach/copy/docs/workshops/v01-content-scoping/round2-gestalt.md` — Pattern definitions and NPC mapping
 - `/var/home/jeroenschweitzer/Projects/settled-reach/copy/docs/workshops/v01-gap-analysis/round2-gestalt.md` — Unified observation system, character identity integration