feat(agent-governor): add Codex workflow policy docs

[ProfRandom92]

Summary

Adds a lightweight CompText Agent Governor policy/documentation layer for Codex-style role, plugin, skill, Site, and annotation workflows.

This PR does not add runtime behavior. It documents how AI-agent repository work should remain bounded by deterministic context packs, policy gates, canonical evidence artifacts, and human review.

What Changed

• Defines CompText Agent Governor positioning.
• Adds Codex workflow policy for role-based agent work.
• Adds documented agent PR policy.
• Adds reusable agent-task issue template.
• Adds Codex role workflow skill guidance.

Boundaries

• No runtime provider calls.
• No deploy behavior.
• No autonomous approval.
• No compliance, legal, forensic, official-SPARK, or production-readiness claim.
• Sites/interactive views are presentation only.
• Evidence packets remain the source of truth.
• Annotations are review inputs, not silent artifact mutation.
• Human review remains the approval boundary.

Validation

Document-only validation:

• Scope check completed.
• Claim-boundary scan completed.
• Root README.md unchanged.
• No generated report churn included.

Reviewer Checklist

• Confirm this PR is documentation/policy only.
• Confirm it preserves provider-output-as-untrusted.
• Confirm Sites are described as presentation only.
• Confirm annotations are described as review inputs.
• Confirm no production/compliance/legal/forensic/official-SPARK/autonomous-approval claims are made.
• Confirm it builds on merged SPARK Evidence Packet v1 from PR feat(sparkctl): add SPARK Evidence Packet v1 #3.

[gemini-code-assist]

Code Review

This pull request introduces the CompText Agent Governor Policy v1, establishing a lightweight policy layer for Codex-style role, plugin, connector, and skill workflows. It adds comprehensive documentation, a skill definition, a YAML policy configuration, and an issue template to guide agents and reviewers. Feedback on the changes suggests aligning the pipeline sequence terminology with existing documentation, explicitly listing all allowed gate states in the skill definition, and expanding the forbidden actions list in the issue template to ensure consistency with the PR policy.

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