Add convert to eml string functionality

Author: jakobkmar

simplekotlinmail-core/src/jvmMain/kotlin/net/axay/simplekotlinmail/email/EmailConverter.kt

@@ -4,17 +4,26 @@ import org.simplejavamail.api.email.Email
 import org.simplejavamail.converter.EmailConverter
 import javax.mail.internet.MimeMessage
 
+// TO EMAIL
+
 /**
  * Convert this MimeMessage to an Email instance.
  */
 val MimeMessage.email: Email get() = EmailConverter.mimeMessageToEmail(this)
 
+/**
+ * Convert this string to an Email instance.
+ */
+fun String.toEmail(): Email = EmailConverter.emlToEmail(this)
+
+// FROM EMAIL
+
 /**
  * Convert this Email instance to a MimeMessage
  */
 val Email.mimeMessage: MimeMessage get() = EmailConverter.emailToMimeMessage(this)
 
 /**
- * Convert this string to an Email instance.
+ * Convert this Email instance to an eml string
  */
-fun String.toEmail(): Email = EmailConverter.emlToEmail(this)
+val Email.eml: String get() = EmailConverter.emailToEML(this)