feature: Add examples for scaffolder actions

[niallthomson]

🔖 Feature description

Scaffolder actions can include examples which are rendered in the Backstage UI to help users understand how to use the actions.

Each of the scaffolder actions in this repository should provide at least one example.

🎤 Context

Example:

Action: https://github.com/backstage/backstage/blob/96b23786f648ea28c2ab81d4888c46ab8bbd907b/plugins/scaffolder-backend-module-azure/src/actions/azure.ts#L59

Examples: https://github.com/backstage/backstage/blob/master/plugins/scaffolder-backend-module-azure/src/actions/azure.examples.ts

✌️ Possible Implementation

No response