Adding Contoso Real Estate workshop

[cyz]

• [x] Your workshop design document, filled in with some details about your proposed workshop including its title and the three stages in the designer delineated, using the workshop-designer.md file in the template.

• [x] A README.md file that describes the steps of the workshop.

• [x] Powerpoint Slides for the workshop. (hosted on Reactor's repository)

• [x] The workshop's solution in the /solution folder.

• [x] An embedded Train the Trainer video.

• [x] A Call to Action to enhance the workshop with a direct line to Microsoft Learn by linking to an appropriate Learn module. (hosted on Reactor's repository)

• [x] Code quality check: no authentication keys should be included in solution or sample code

[leestott]

@cyz can you confirm you want this merging can you resolve the conflict in readme.md

[cyz]

Hi @leestott, fixed! 👍