[c++] Limit batch scanner#614
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leekeiabstraction
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LGTM, thank you for the PR!
charlesdong1991
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closes #615
C++ binding for the limit scan from #515.
table.NewScan().Limit(n).CreateBucketBatchScanner(bucket, scanner)returns aBatchScannerwithNextBatch(),CollectAllBatches()andBucket(). It wraps the coreLimitBatchScannerand hands the rows back as Arrow batches over the existing C Data Interface path, so there's little new plumbing.