[DOCS][FEATURE] Develop content strategy for the learning guide cookbook

[FiniteStateGit]

Describe the issue briefly

Develop content strategy for the learning guide cookbook and create content for the cookbook index.

Page metadata: linktitle: Cookbooks title: Open 3D Engine (O3DE) Cookbooks description: Discover practical, tested solutions for common scenarios in Open 3D Engine (O3DE). weight: 100 draft: true

Which page(s) / section(s) are affected?

content\docs\learning-guide\cookbooks_index.md

[chanmosq]

We should also consider adding to the Contributing Guide, clarifying the intent of the learning guide cookbook and what kind of documentation goes here.

[chanmosq]

Consider bumping up the priority when there's content that we need to create a cookbook around