Refactor to eliminate hardcoded identifiers

Read package identifier and app group ID from Info.plist at runtime
via AppConfiguration. This enables SFM.System to use TeamID-prefixed
app group format required by macOS Sequoia, fixing the privacy prompt
when accessing app group data.

SFT/Info.plist

@@ -2,9 +2,13 @@
 <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
 <plist version="1.0">
 <dict>
+	<key>BasePackageIdentifier</key>
+	<string>$(BASE_PACKAGE_IDENTIFIER)</string>
+	<key>AppGroupIdentifier</key>
+	<string>$(APP_GROUP_IDENTIFIER)</string>
 	<key>BGTaskSchedulerPermittedIdentifiers</key>
 	<array>
-		<string>io.nekohasekai.sfavt.update_profiles</string>
+		<string>$(BASE_PACKAGE_IDENTIFIER).update_profiles</string>
 	</array>
 	<key>CFBundleURLTypes</key>
 	<array>