Adopt standard eight Spec Kit governance presets

[hindermath]

Zusammenfassung / Summary

• Installiert die exakte Standard-Achtermatrix der Spec-Kit-Governance-Presets.
• Synchronisiert aktuelle normative Guidance, Secure-Development- und Lernreihen-Dokumentation; historische Evidenz bleibt unveraendert.
• Uebernimmt die zentralen Installer, Templates und agentenneutralen Fleet-Rollout-Regeln.
  Validation: exact 8-preset check, Bash and PowerShell parsing, git diff --check, canonical file parity.

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