Initial upload of the Dynamics SL Migration extension (#27530)

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#### Summary: Initial upload of the Dynamics SL Migration extension

#### Work Item(s) <!-- Add the issue number here after the #. The issue
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Fixes #27620

Fixes
[AB#556923](https://dynamicssmb2.visualstudio.com/1fcb79e7-ab07-432a-a3c6-6cf5a88ba4a5/_workitems/edit/556923)

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Co-authored-by: Jesper Schulz-Wedde <[email protected]>