feat: update endpoints for blueprints APIs in hathor core

[pedroferreira1]

Context

When I was creating a new API in the hathor core to get the blueprint source code, I had a discussion with @msbrogli about the best path for it. We ended up deciding to use /blueprint/source and, to keep consistency, we changed /blueprint (which returned the blueprint information) to /blueprint/info.

We decided to do it now that we don't have many clients using it and we can quickly update the lib and wallets with this new version.

Acceptance Criteria

• Update blueprint info and blueprint source code endpoint URLs for the hathor core

Security Checklist

• Make sure you do not include new dependencies in the project unless strictly necessary and do not include dev-dependencies as production ones. More dependencies increase the possibility of one of them being hijacked and affecting us.