Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• Commit messages follow the conventional commits spec
• If this is a code change: I have written unit tests.
• If this changes code in a published package: I have run pnpm changeset to create a changeset JSON document appropriate for this change.
• If this is a new API or substantial change: the PR has an accompanying issue (closes #0000) and the maintainers have approved on my working plan.

Motivation

This PR adds a new Provider.viewGlobalContractCode method for retrieving global contract code using either a codeHash, or an accountId identifier.

Example usage:

provider.viewGlobalContractCode({
    identifier: { accountId: "global_contract.near" },
});
provider.viewGlobalContractCode({
    identifier: { codeHash: "J1arLz48fgXcGyCPVckFwLnewNH6j1uw79thsvwqGYTY" },
});

Test Plan

Related issues/PRs

Should be merged after #1795