iOS: release/dev/prov builds, publish.sh, dev icon variants

release = org.cdnutter.<name> (main, Gitea release + Sideload)
dev     = org.cdnutter.<name>-dev (dev branch, Gitea pre-release + Sideload Developer)
prov    = org.cdnutter.<name>-prov (personal signed, never published)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

ios/scripts/make-source.py

@@ -36,7 +36,8 @@ versions = []
 for rel in get(API + "/releases?limit=50"):
     v = rel["tag_name"].removeprefix("ios-v")
     ipa = next((a for a in rel["assets"] if a["name"] == f"stemify-{v}.ipa"), None)
-    if not rel["tag_name"].startswith("ios-v") or not ipa:
+    # Pre-releases are dev builds (org.cdnutter.stemify-dev), they go to Sideload Developer instead.
+    if not rel["tag_name"].startswith("ios-v") or not ipa or rel["prerelease"]:
         continue
     versions.append({
         "version": v.split("-")[0],