Add GTNF integration capture pack under docs/vnext/integration

[mdheller]

What this PR does

Adds a focused GTNF capture pack under docs/vnext/integration/gtnf/ so the work is reviewable inside the TriTRPC repository without mixing in unrelated runtime artifacts or branch-local noise.

Included in this capture

• canonical GTNF index and positioning summary
• concise GTNF white paper capture
• concise ASI / SingularityNET integration manual
• math-forward external overview
• validation summary
• runtime validation protocol summary
• first Cosmos / IBC runtime summary
• minimal runtime manifest for the IBC handoff path

Why this shape

This is intentionally a curated capture subset, not the full local artifact dump.

The goal is to preserve the doctrine, integration posture, validation posture, and first runtime target inside the repo in a way that is easy to review and discuss publicly.

Explicitly not claimed here

• no live Hermes validation result yet
• no exact Hermes tag lock yet
• no observed ASI(FET)+MPE payment trace yet
• no claim that this repo subset is the full GTNF local corpus

Current posture

GTNF is framed here as a governed release and export-control layer that can sit above existing rails. The working posture remains:

• agree with live rails where they already work
• wrap them with stronger proof and policy boundaries
• extend them where witness, contradiction, reserve, and export control are missing
• defer substrate rewrites until validation proves them necessary

Follow-on work

The next real hardening step remains runtime validation in a network-capable environment, especially the first Hermes / IBC pass against the locked Classic baseline.