update getting topics to paging data

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https://github.com/MamboBryan/poetree/blob/3659a81754c302c09c55c8168b88893658050bae/common/src/commonMain/kotlin/com/mambo/poetree/data/repositories/TopicsRepository.kt#L27

    suspend fun get(topicId: Int) = poemsApi.getTopic(topicId)

    // TODO: update getting topics to paging data
    suspend fun getTopics(page:Int) = poemsApi.getTopics(page= page)

}