Add doc for binary format support in k-NN

[junqiu-lei]

Description

Add doc for binary format support in k-NN

Issues Resolved

Closes https://github.com/opensearch-project/documentation-website/issues/7835

Version

Since 2.16

Frontend features

N/A

Checklist

• [x] By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and subject to the Developers Certificate of Origin. For more information on following Developer Certificate of Origin and signing off your commits, please check here.

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[heemin32]

Could you add hamming as space type in https://opensearch.org/docs/latest/search-plugins/knn/knn-score-script/?

The difference between hammingbit and hamming is that, hamming works only with knn field of binary data type whereas hammingbit works with long and binary type(https://opensearch.org/docs/latest/search-plugins/sql/datatypes/).

[junqiu-lei]

Could you add hamming as space type in https://opensearch.org/docs/latest/search-plugins/knn/knn-score-script/?

The difference between hammingbit and hamming is that, hamming works only with knn field of binary data type whereas hammingbit works with long and binary type(https://opensearch.org/docs/latest/search-plugins/sql/datatypes/).

Added

[junqiu-lei]

@junqiu-lei @kolchfa-aws Please see my comments and changes and let me know if you have any questions. Thanks!

The changes LGTM, thanks!