Implement Android RSS/Atom feed parser

- Add FeedParser.kt with automatic feed type detection
- Add RSSParser.kt for RSS 2.0 feeds
- Add AtomParser.kt for Atom 1.0 feeds
- Add comprehensive unit tests for both parsers
- Support iTunes namespace and enclosures
- Fix pre-existing compilation issues in the codebase
- Update build.gradle.kts with proper dependencies and AGP 8.5.0

native-route/android/src/main/java/com/rssuper/parsing/ParseResult.kt

@@ -0,0 +1,13 @@
+package com.rssuper.parsing
+
+import com.rssuper.models.Feed
+
+data class ParseResult(
+    val feedType: FeedType,
+    val feed: Feed
+)
+
+sealed class FeedParsingError : Exception() {
+    data object UnsupportedFeedType : FeedParsingError()
+    data object MalformedXml : FeedParsingError()
+}