Restructure three-pronged → knowledge-layers: collapse 11 files to 3, integrate into main architecture

- Rename 'three-pronged' folder to 'knowledge-layers' — prong metaphor
  was misleading (implied parallel tines), replaced with epistemic layers
  (deductive base, empirical middle, probabilistic oracle — vertical stack)
- Collapse 11 overlapping files into 3 coherent documents:
  - knowledge-layers/_index.org: core framework (two engines + one store,
    World Model formula, 0-14 layer table, provenance store design,
    conflict resolution, cold-start, stage mapping)
  - knowledge-layers/practical-implications.org: design-world-aware-of-
    physics, 10 powers, Schafmeister existence proof, epistemic transparency
  - knowledge-layers/neurological-empirical.org: neural networks in
    provenance framework (kept intact)
- Relocate wolfram/mathematica and Schafmeister docs to ideas/viability/
- Integrate into main architecture _index.org:
  - Gate: expanded from two vectors (ACL2+LLM) to three (deductive,
    provenance/empirical, LLM oracle)
  - Autodidactic loop: split into Track 1 (deductive hardening, fast)
    and Track 2 (empirical validation, slow, experimental-feedback-driven)
  - See also: added Knowledge Layers cross-reference
- Add all-lisp geometry engine note (ideas/lisp-geometry-engine.org) as
  concrete illustration of the empirical layer's effect on design work
- Rebuild site: 148 files, 0 errors

projects/passepartout/strategy/impact/phase-0-impact.org

@@ -2,7 +2,7 @@
 :ID:       a0b1c2d3-e4f5-6789-0abc-def012345678
 :CREATED:  [2026-05-25 Mon]
 :END:
-#+title: Phase 0 — Impact
+#+title: Phase 0
 #+filetags: :passepartout:strategy:adoption:impact:
 
 Phase 0 spans 10 to 10² users. The system is live but barely visible.

projects/passepartout/strategy/impact/phase-1-impact.org

@@ -2,7 +2,7 @@
 :ID:       b1c2d3e4-f5a6-7890-1bcd-ef0123456789
 :CREATED:  [2026-05-25 Mon]
 :END:
-#+title: Phase 1 — Impact
+#+title: Phase 1
 #+filetags: :passepartout:strategy:adoption:impact:
 
 Phase 1 spans 10² to 10⁴ users. The protocol's existence becomes

projects/passepartout/strategy/impact/phase-2-impact.org

@@ -2,7 +2,7 @@
 :ID:       c2d3e4f5-a6b7-8901-2cde-f01234567890
 :CREATED:  [2026-05-25 Mon]
 :END:
-#+title: Phase 2 — Impact
+#+title: Phase 2
 #+filetags: :passepartout:strategy:adoption:impact:
 
 Phase 2 spans 10⁴ to 10⁶ users. The protocol's economic weight becomes

projects/passepartout/strategy/impact/phase-3-impact.org

@@ -2,7 +2,7 @@
 :ID:       d3e4f5a6-b7c8-9012-3def-012345678901
 :CREATED:  [2026-05-25 Mon]
 :END:
-#+title: Phase 3 — Impact
+#+title: Phase 3
 #+filetags: :passepartout:strategy:adoption:impact:
 
 Phase 3 spans 10⁶ to 10⁸ users. Both the verification and social

projects/passepartout/strategy/impact/phase-4-impact.org

@@ -2,7 +2,7 @@
 :ID:       e4f5a6b7-c8d9-0123-4ef0-123456789012
 :CREATED:  [2026-05-25 Mon]
 :END:
-#+title: Phase 4 — Impact
+#+title: Phase 4
 #+filetags: :passepartout:strategy:adoption:impact:
 
 Phase 4 spans 10⁸ to 10⁹ users. Two-tier computing is the stable