Expand declarative upstream providers

pkgbuilds/symfony-cli/.omarchy/package.json

@@ -1,4 +1,11 @@
 {
   "source": "local",
-  "release_ring": "fast"
+  "release_ring": "fast",
+  "upstream": {
+    "github": "symfony-cli/symfony-cli",
+    "checksums": "checksums.txt",
+    "assets": {
+      "any": "symfony-cli-{pkgver}.tar.gz"
+    }
+  }
 }