Update spinner messages to reflect file upload actions across multiple classes

Fix typos and improve questionnaire handling in Amazon, eBay, and Content classes

Refactor Amazon and eBay classes to implement marketplace questionnaires; update session state management and input handling in response marketplace.

Refactor debug information keys for eBay category and images to include '- eBay' suffix for clarity

Add eBay class for handling product data input and telemetry collection