chore: move repo references to the GameplanePanel org

[ValgulNecron]

The repos moved from ValgulNecron to GameplanePanel (Gameplane, gameplane-module → module, gameplane-website → website). This PR does the same rename here that GameplanePanel/Gameplane#622 did in the main repo.

What changed

One scripted find-and-replace over the tracked files, with the mappings applied in the order given:

1. valgulnecron.github.io/gameplane-website → gameplanepanel.github.io/website (no matches)
2. ValgulNecron/gameplane-module(s) → GameplanePanel/module
3. ValgulNecron/gameplane-website → GameplanePanel/website (fixes the "edit this page" link in DocsEditPageCard.astro)
4. ghcr.io/valgulnecron/ → ghcr.io/gameplanepanel/ (skipped in install/upgrade docs, see below)
5. ValgulNecron/Gameplane → GameplanePanel/Gameplane (GITHUB_URL, doc links, README, AGENTS.md)
6. ValgulNecron/gameplane → GameplanePanel/gameplane (no matches)
7. Repo names written bare in prose ( `gameplane-module` repository and similar) → GameplanePanel/module / GameplanePanel/website. The fork URL in contributing.mdx is now <you>/module.git. The Secret name gameplane-module-cosign-pub is unchanged.

src/config.ts: since #12 the site is served from the custom domain gameplane.net at /. I kept CUSTOM_DOMAIN and changed only the project-page fallback: SITE → https://gameplanepanel.github.io, BASE → /website, and the comment. If the fallback were made the live value, the custom domain would stop working. For the same reason public/robots.txt (sitemap at gameplane.net) needed no change. The sitemap is generated from SITE.

package.json / package-lock.json: neither has a repository or homepage field, so I changed nothing. The package name gameplane-website is left as is.

Published releases keep ghcr.io/valgulnecron: releases up to and including v0.3.0 are only published there. These pages keep that registry and get a one-line note saying so: getting-started, installation, production-installation, air-gapped-installation, upgrades-migrations, platform-disaster-recovery, cluster-nodes-kubeconfig, executable-upgrades-rollback and helm-values-reference (the default image.registry of the published chart). The landing-page hero command in src/pages/index.astro also keeps the old registry. It has no note, because a note there would be a design change that has to go through website.pen first.

Moved to ghcr.io/gameplanepanel: pages about authoring and the release process going forward: module-authoring, module-cluster-crds (field example) and ci-releases-signing.

Left alone: the changelog, website.pen and website-export/.

Verification

• npm ci && npm run build: 95 pages built. npm run check: 0 errors, 0 warnings.
• git grep -i valgulnecron returns hits only in website-export/, website.pen, the changelog and the install exceptions above.
• I also ran a throwaway build with CUSTOM_DOMAIN unset (not committed). Canonical URLs and the sitemap use https://gameplanepanel.github.io/website/…. I checked 6,560 internal href/src values: all use the /website/ base, and 2 don't resolve. Both are also broken on main today:
  • src/pages/docs/index.astro:332 builds BASE_URL + "/docs/". That gives //docs/ on the current custom-domain build, which browsers read as a link to a host called docs.
  • Several docs link to /docs/dashboard-tour/, but src/pages/docs/[slug].astro filters that page out.

Follow-ups

• website.pen / website-export/: update the old strings through Pencil, not by hand. website.pen lines 1032, 2350, 5503 and 15821 hold ghcr.io/valgulnecron/… install snippets. The matching exports are website-export/json/JjbY2.json, hnTHJ.json, iif2F.json and vAYOC.json. Only change them once a release is published under ghcr.io/gameplanepanel, together with the index.astro hero command.
• GitHub Pages settings for the renamed repo: confirm Pages is still enabled and the custom domain gameplane.net is still attached to GameplanePanel/website. If the custom domain is ever dropped, the /website fallback is ready.
• Submodule pointer: bump website in GameplanePanel/Gameplane after this merges (git add website).
• Switch the install/upgrade docs to ghcr.io/gameplanepanel and remove the notes once the first release is published there.
• Fix the two broken links listed under Verification (separate PR).

🤖 Generated with Claude Code

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