Add claude-desktop, Anthropic's Linux desktop beta

Anthropic ships the Claude desktop app for Linux only through its own
Debian repository, so the package repacks the deb the way
openai-codex-desktop does: extract data.tar.xz, replace the bare
/usr/bin symlink with a launcher that asks Chromium for Wayland
directly, and keep the vendor copyright as the license.

Updates come through the declarative "debian" upstream provider: the
apt Packages index names the newest version, and the per-architecture
pool debs are hashed when one appears. Verified by pinning 1.44121.2
and watching bin/sync-upstream rewrite it back to 1.46388.2
byte-identically.

pkgbuilds/claude-desktop/.omarchy/package.json

@@ -0,0 +1,12 @@
+{
+  "source": "local",
+  "release_ring": "fast",
+  "upstream": {
+    "debian": "https://downloads.claude.ai/claude-desktop/apt/stable/dists/stable/main/binary-amd64/Packages",
+    "package": "claude-desktop",
+    "sources": {
+      "x86_64": ["https://downloads.claude.ai/claude-desktop/apt/stable/pool/main/c/claude-desktop/claude-desktop_{pkgver}_amd64.deb"],
+      "aarch64": ["https://downloads.claude.ai/claude-desktop/apt/stable/pool/main/c/claude-desktop/claude-desktop_{pkgver}_arm64.deb"]
+    }
+  }
+}