Feat: dynamic prefabs sample prefabs organizing and renaming

[jilfranco-unity]

Description

renaming and changing the materials of the spawned prefabs. also put them in their own folder

Contribution checklist

• Tests have been added for the project and/or any internal package
• Release notes have been added to the project changelog file
• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• JIRA ticket ID is in the PR title or at least one commit message
• Include the ticket ID number within the body message of the PR to create a hyperlink

[fernando-cortez]

Just a note to move Magenta prefab, and to use Directional Light & Main Camera prefabs in the scenes.