Add New Nathan Script

[Telucero]

Description

Adds the New Nathan Script and commit gate that covers :

github/workflows/trigger-n8n-workflow.yml	Major workflow redesign: dispatch-only, trigger phrase gating, one-shot check-run locking, stable compare-based diff collection, artifact-based response handling, and new PR head SHA guards before send/comment.
.github/workflows/nathan-commit-gate.yml	New workflow that gates on maintainer permissions + +Nathan commit message and dispatches the main Nathan workflow on PR synchronize.

Checklist

• Added a label 🏷️ to this PR
• Ran my changes through Grammarly
• Added a disclaimer if required
• If pages were moved, opened a corresponding PR in moonbeam-mkdocs to update redirects

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Translations

Does this PR update a page that also exists on the Chinese docs site? See mapping to confirm.

• Yes
• No

If Yes, complete the following:

• Opened a PR on the Chinese docs repo for the corresponding page
• Updated images, snippets, or variables if they were moved, renamed, or deleted

Link to the corresponding CN docs PR: <INSERT_LINK>

[Copilot]

Pull request overview

Refactors the “Nathan” automation to run only via workflow_dispatch, adding a new commit-gate workflow to selectively dispatch the main n8n-trigger workflow for PR updates.

Changes:

• Redesign trigger-n8n-workflow.yml to be dispatch-only with trigger phrase gating, one-shot check-run locking, stable compare-based diff collection, and artifact-based response handling.
• Add nathan-commit-gate.yml to gate dispatch on maintainer permissions and +Nathan in the latest commit message on PR synchronize.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 3 comments.

File	Description
.github/workflows/trigger-n8n-workflow.yml	Major dispatch-only redesign with gating, SHA guards, compare-based diff building, and artifact-based response validation/commenting.
.github/workflows/nathan-commit-gate.yml	New PR synchronize gate that conditionally dispatches the main workflow when a maintainer pushes a +Nathan commit.

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