[Fix] Changes Money.amount type to string following GraphQL schema Decimal type

[sle-c]

WHY are these changes introduced?

Money.amount type from GraphQL actually returns a string as a result of Decimal serialization in the Admin GraphQL schema.

See

• https://shopify.dev/docs/api/functions/reference/cart-transform/graphql/common-objects/moneyv2
• https://shopify.dev/docs/api/functions/reference/cart-transform/graphql/scalar#decimal-2024-10

WHAT is this pull request doing?

Changes amount type from number to string

Type of change

• Patch: Bug (non-breaking change which fixes an issue)
• Minor: New feature (non-breaking change which adds functionality)
• Major: Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist

• I have used pnpm changeset to create a draft changelog entry (do NOT update the CHANGELOG.md files manually)
• I have added/updated tests for this change
• I have documented new APIs/updated the documentation for modified APIs (for public APIs)

[sle-c]

Discussed with @lizkenyon and we think that this is too big of a breaking change. Liz suggested we use a less breaking approach to cast the response from the graphql response to the number type. We agreed on it and I'll modify this PR to do so

[sle-c]

Follow up with #1863

[matteodepalo]

LGTM

[sle-c]

hey @matteodepalo , this is too much of a breaking change so I'll close this in favor of #1863