Adding new impl in store.cairo and solving all todo comments

[Gerson2102]

Pull Request Overview

📝 Summary

This PR is implementing the ExperienceCalculatorImpl in the store.cairo file. Also I solved all the todos in located in the file.

Related Issues

• Closes 📝[FIX]: Store.cairo TODOs and Experience System #138

Type of Change

Mark with an x all the checkboxes that apply (like [x]).

• 📝 Documentation (updates to README, docs, or comments)
• 🐛 Bug fix (non-breaking change which fixes an issue)
• 👌 Enhancement (non-breaking change which adds functionality)
• 💥 Breaking change (fix or feature that would cause existing functionality to change)

🔧 Tests Results

Test Coverage

• Unit Tests
• Integration Tests
• Manual Testing

Evidence

[Gerson2102]

Hey mates @coxmars @jimenezz22 this PR is ready for review. The CI is failing because of versions but I think that's something out of my control. If not please lmk!