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Add standard open-source project files: - LICENSE.md — GNU GPL v3.0 or later (verbatim) - CONTRIBUTING.md — setup, workflow, and required AI-usage disclosure - CONTRIBUTORS.md — maintainers, contributors, AI-assistance policy - CODE_OF_CONDUCT.md — Contributor Covenant 2.1 - SECURITY.md — private vulnerability reporting - .gitea/ISSUE_TEMPLATE/* + PULL_REQUEST_TEMPLATE.md - README: License section (Copyright (C) 2026 Runic Gateway) Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01XmHdsbnLzDMAVQkAoTQSBe