Add Migrations directory

[Naarcha-AWS]

Description

The following PR adds the initial content from the migrations wiki. The content itself has not been reviewed by a writer. @sumobrian and myself plan to address each piece of content in smaller chunks.

The documentation found within this PR will not be published until PR #8615 is merged. #8615 will not be merged until the content has been reviewed.

Issues Resolved

Closes #[insert issue number]

Version

List the OpenSearch version to which this PR applies, e.g. 2.14, 2.12--2.14, or all.

Frontend features

If you're submitting documentation for an OpenSearch Dashboards feature, add a video that shows how a user will interact with the UI step by step. A voiceover is optional.

Checklist

• 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.

[github-actions]

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[sumobrian]

Even though an update was done 4 days ago, it looks like there are changes that are older than 4 days that have not been applied. Looking at git logs changes after in the following commit and after have not been added:
commit 6c64d5b9e249de3578e9676bb80f30e41087dc4d
Author: Brian Presley [email protected]
Date: Thu Oct 17 17:15:18 2024 -0500

Regardless, I think we will have to do a sync and define a cut-over point so I'm okay approving as-is.

There's a reference to the old architecture that should be removed.

[sumobrian]

This should be updated

[Naarcha-AWS]

Even though an update was done 4 days ago, it looks like there are changes that are older than 4 days that have not been applied. Looking at git logs changes after in the following commit and after have not been added: commit 6c64d5b9e249de3578e9676bb80f30e41087dc4d Author: Brian Presley [email protected] Date: Thu Oct 17 17:15:18 2024 -0500

Regardless, I think we will have to do a sync and define a cut-over point so I'm okay approving as-is.

There's a reference to the old architecture that should be removed.

I'll go ahead and update this before we merge.

[natebower]

LGTM