feat(l10n): add European Portuguese translations

Translate all 253 user-facing strings to European Portuguese (pt-PT, formal;
EP vocabulary — ficheiro, guardar, Definições, partilhar). Generates
values-pt/strings.xml for KMP, pt localizations in the Apple catalog, and adds
pt to CFBundleLocalizations.

apple/VniDrop/Resources/Info.plist

@@ -9,6 +9,7 @@
 		<string>es</string>
 		<string>it</string>
 		<string>de</string>
+		<string>pt</string>
 	</array>
 	<key>CADisableMinimumFrameDurationOnPhone</key>
 	<true/>