Add Spontaneous Order Principles core document

Distills philosophical insights from emergent systems thinking into
five enterprise-applicable principles, mapped to the antifragile
manifest pillars. Excludes all anarcho-taoist references.

- New: core/spontaneous-order-principles.md
- Updated: core/antifragile-manifest.md (cross-references)
- Updated: index.md (navigation and document tables)

antifragile-consulting/core/antifragile-manifest.md

@@ -15,6 +15,7 @@ This is not a security framework. It is a **strategic operating philosophy** for
 
 *For the full executive summary, see [Executive Summary](executive-summary.md).*
 *For board conversation guidance, see [C-Suite Conversation Guide](c-suite-conversation-guide.md).*
+*For the philosophical foundation behind these pillars, see [Spontaneous Order Principles](spontaneous-order-principles.md).*
 
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@@ -22,6 +23,8 @@ This is not a security framework. It is a **strategic operating philosophy** for
 
 This manifest defines the five foundational pillars of an antifragile enterprise. It is not a security framework. It is a **strategic operating philosophy** for organizations that intend to outlast their competitors, their regulators, and their own assumptions.
 
+For the reasoning *why* these pillars work—drawn from natural systems, distributed networks, and emergent order—see [Spontaneous Order Principles](spontaneous-order-principles.md).
+
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 ## Pillar 1: Structural Decoupling
@@ -171,4 +174,5 @@ This manifest is a living framework. Each engagement will surface new stressors,
 
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+*For the philosophical foundation behind these pillars, see [Spontaneous Order Principles](spontaneous-order-principles.md).*
 *Next: [AI Sovereignty Framework](ai-sovereignty-framework.md)*