refactor: improve ResourceData.kt

Old methods have been marked as deprecated, and will be removed in the future.

- ResourceData.kt was made an Iterable<File>, and the forEach method was removed in favor of Kotlin's forEach function. (no modifications required)
- The resolve method was deprecated in favor of a new operator getter function, which can be either called using get(path) or data[path]. This keeps backwards compatibility with the old get method.
- The getXmlEditor method was deprecated in favor of the new xmlEditor variable, which is a XmlFileHolder which has an operator getter which acts like an array. This is syntactically better.

src/main/kotlin/app/revanced/patcher/data/impl/ResourceData.kt

@@ -9,13 +9,20 @@ import javax.xml.transform.TransformerFactory
 import javax.xml.transform.dom.DOMSource
 import javax.xml.transform.stream.StreamResult
 
-class ResourceData(private val resourceCacheDirectory: File) : Data {
-    private fun resolve(path: String) = resourceCacheDirectory.resolve(path)
+class ResourceData(private val resourceCacheDirectory: File) : Data, Iterable<File> {
+    operator fun get(path: String) = resourceCacheDirectory.resolve(path)
+    val xmlEditor = XmlFileHolder()
+    override fun iterator() = resourceCacheDirectory.walkTopDown().iterator()
 
-    fun forEach(action: (File) -> Unit) = resourceCacheDirectory.walkTopDown().forEach(action)
-    fun get(path: String) = resolve(path)
+    inner class XmlFileHolder {
+        operator fun get(path: String) = DomFileEditor(this@ResourceData[path])
+    }
 
-    fun getXmlEditor(path: String) = DomFileEditor(resolve(path))
+    @Deprecated("Use operator getter instead of resolve function", ReplaceWith("get(path)"))
+    fun resolve(path: String) = get(path)
+
+    @Deprecated("Use operator getter on xmlEditor instead of getXmlEditor function", ReplaceWith("xmlEditor[path]"))
+    fun getXmlEditor(path: String) = xmlEditor[path]
 }
 
 class DomFileEditor internal constructor(private val domFile: File) : Closeable {

src/test/kotlin/app/revanced/patcher/usage/resource/patch/ExampleResourcePatch.kt

@@ -18,8 +18,8 @@ import org.w3c.dom.Element
 @Version("0.0.1")
 class ExampleResourcePatch : ResourcePatch() {
     override fun execute(data: ResourceData): PatchResult {
-        data.getXmlEditor("AndroidManifest.xml").use { domFileEditor ->
-            val element = domFileEditor // regular DomFileEditor
+        data.xmlEditor["AndroidManifest.xml"].use { editor ->
+            val element = editor // regular DomFileEditor
                 .file
                 .getElementsByTagName("application")
                 .item(0) as Element