refactor: convert responses class from java to kotlin

package com.fsck.k9.mail.store.imap;

package com.fsck.k9.mail.store.imap

class Responses {

    public static final String CAPABILITY = "CAPABILITY";

    public static final String NAMESPACE = "NAMESPACE";

    public static final String LIST = "LIST";

    public static final String LSUB = "LSUB";

    public static final String OK = "OK";

    public static final String NO = "NO";

    public static final String BAD = "BAD";

    public static final String PREAUTH = "PREAUTH";

    public static final String BYE = "BYE";

    public static final String EXISTS = "EXISTS";

    public static final String EXPUNGE = "EXPUNGE";

    public static final String PERMANENTFLAGS = "PERMANENTFLAGS";

    public static final String COPYUID = "COPYUID";

    public static final String SEARCH = "SEARCH";

    public static final String UIDVALIDITY = "UIDVALIDITY";

    public static final String ENABLED = "ENABLED";

internal object Responses {

    const val CAPABILITY: String = "CAPABILITY"

    const val NAMESPACE: String = "NAMESPACE"

    const val LIST: String = "LIST"

    const val LSUB: String = "LSUB"

    const val OK: String = "OK"

    const val NO: String = "NO"

    const val BAD: String = "BAD"

    const val PREAUTH: String = "PREAUTH"

    const val BYE: String = "BYE"

    const val EXISTS: String = "EXISTS"

    const val EXPUNGE: String = "EXPUNGE"

    const val PERMANENTFLAGS: String = "PERMANENTFLAGS"

    const val COPYUID: String = "COPYUID"

    const val SEARCH: String = "SEARCH"

    const val UIDVALIDITY: String = "UIDVALIDITY"

    const val ENABLED: String = "ENABLED"

}