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/Stemify/Resources/Assets.xcassets/AppIconDev.appiconset/Contents.json

@@ -1 +1,8 @@
-{"images":[{"filename":"icon.png","idiom":"universal","platform":"ios","size":"1024x1024"}],"info":{"author":"xcode","version":1}}
+{
+  "images" : [
+    { "filename" : "icon.png", "idiom" : "universal", "platform" : "ios", "size" : "1024x1024" },
+    { "appearances" : [ { "appearance" : "luminosity", "value" : "dark" } ], "filename" : "icon-dark.png", "idiom" : "universal", "platform" : "ios", "size" : "1024x1024" },
+    { "appearances" : [ { "appearance" : "luminosity", "value" : "tinted" } ], "filename" : "icon-tinted.png", "idiom" : "universal", "platform" : "ios", "size" : "1024x1024" }
+  ],
+  "info" : { "author" : "xcode", "version" : 1 }
+}