Added Wild Workouts Go project

[roblaszczak]

Description

In this PR, I'm adding a link to https://github.com/ThreeDotsLabs/wild-workouts-go-ddd-example (5k stars) and a list of detailed articles that show how to apply used techniques in other projects.

Types of changes

• [ ] Content Update (change which fixes an issue or updates an already existing submission)
• [x] New Article (change which adds functionality)
• [ ] Documentation change

Checklist:

• [x] My code follows the code style of this project.
• [x] I have updated the documentation accordingly.
• [x] I have read the CONTRIBUTING document.
• [x] I have made checks to ensure URLs and other resources are valid