Add blog for mds experience in dashboards

[BionIT]

Description

This blog provides a quick glance at the accumulated features of multi-data sources from version 2.4 to 2.14 and how these features empower your productivity with unified experience.

Issues Resolved

#2812

Check List

• [ ] Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the BSD-3-Clause License.

[BionIT]

@hdhalter @pajuric This PR has been open for 5days, and it will be part of 2.14 release. Could you help with next steps?

[hdhalter]

@hdhalter @pajuric This PR has been open for 5days, and it will be part of 2.14 release. Could you help with next steps?

Sure, @BionIT, I'll have a tech writer review it. In the meantime, can you please fix the Vale errors?

[natebower]

https://github.com/opensearch-project/documentation-website/issues/7139

[natebower]

Per @pajuric, now being reviewed by @brijos: https://github.com/opensearch-project/documentation-website/issues/7139#issuecomment-2110646779

[natebower]

Per @brijos, he will work with the appropriate technical writer to revise the draft and then send for editorial review.

[BionIT]

Thanks @hdhalter and @natebower ! I will address the Vale errors in the meanwhile

[natebower]

@pajuric Over to you. Thanks!

[pajuric]

@krisfreedain @nateynateynate - blog is ready to go. However, we'll need to push an update to the title and date edits to get this live since the author is OOO.