Feature: get_store_estimated_price

[1yam]

In pyaleph we can use the endpoints:

/api/v0/price/estimate

To fetch price of Executable Content, but we can also use it for store Content, but wasn't handle here

[github-actions]

Summary:
The PR introduces a new method get_store_estimated_price which adds significant complexity to the existing codebase. This method involves multiple steps and interactions with external APIs, which could potentially introduce bugs or require a deep understanding of the project's architecture. The method is substantial and does not seem to be a simple refactoring or documentation update.

Highlighting relevant parts of the diff:

• Addition of a new method get_store_estimated_price with extensive logic.
• Involvement of external API calls and JSON serialization.
• Potential for introducing bugs or requiring complex debugging.

This PR likely requires a thorough review by experienced developers who understand the intricacies of the project's architecture and the potential risks involved.