Improve guidance for fabric setup once git sync and workspace workflow finalized

[LeonardHd]

Fabric's git integration and workspace flow is still evolving. We need to add some guideance for setup and link potential Microsoft docs to enable the user to understand the workflow using PRs and Azure Devops.

[arjendev]

Let's make sure each example uses the same folder structure as closely aligned with the structure in fabric

[arjendev]

As agreed during our weekly:

1. Let's try to follow the "fabric" folder structure
2. Rename the nested fabric folder to something that indicates it's the git synced repository.
3. Use the same folder structure for all fabric examples