improvements and actualization

src/jvmMain/kotlin/dev/inmo/saucenaoapi/utils/ActualMPPFile.kt

@@ -0,0 +1,14 @@
+package dev.inmo.saucenaoapi.utils
+
+import io.ktor.http.ContentType
+import io.ktor.utils.io.core.Input
+import io.ktor.utils.io.streams.asInput
+import java.io.File
+import java.nio.file.Files
+
+actual typealias MPPFile = File
+
+actual val MPPFile.input: Input
+    get() = inputStream().asInput()
+actual val MPPFile.contentType: ContentType
+    get() = ContentType.parse(Files.probeContentType(toPath()))