Take over openai-codex-desktop from the AUR

OpenAI ships the ChatGPT desktop app several times a week and the AUR
packaging trails it -- as of this commit by a full version, 26.803.81509
against 26.810.52044. Every sync we took from there was a sync we could have
taken from OpenAI directly.

So track OpenAI's own Debian repository instead. Its per-architecture package
index carries the version and SHA256 of every deb, which makes an update two
small HTTP requests rather than a 750 MB download, and the pool keeps old
versions, so the URLs pinned here stay resolvable after the next release.

Omarchy now maintains the package outright: the max-zstd patch is simply part
of the PKGBUILD, chatgpt-launcher.sh is ours, and the Arch REUSE files are
gone -- they annotated packaging paths (.SRCINFO, keys/**, .nvchecker.toml)
that do not exist here. The app's own license still ships; package() installs
upstream's copyright file.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

pkgbuilds/openai-codex-desktop/.omarchy/package.json

@@ -1,5 +1,4 @@
 {
-  "source": "aur",
-  "release_ring": "fast",
-  "upstream_commit": "05f12e3c51ce07efb996698d4fae94327f45f03b"
+  "source": "local",
+  "release_ring": "fast"
 }