Use manifest reading for contracts info

[glihm]

Let's try to use the Manifest type from dojo to read manifests content. This would be easier to avoid hardcoding addresses.

Manifest types:
https://github.com/dojoengine/dojo/blob/acb476a4eea607322c57d779b619aafd29a17d75/crates/dojo/world/src/diff/manifest.rs#L149

How to read form the file:
https://github.com/dojoengine/dojo/blob/acb476a4eea607322c57d779b619aafd29a17d75/crates/sozo/scarbext/src/workspace.rs#L157

we should't have to import the scarbext, only the dojo-world crate.

[okhaimie-dev]

I will take a look