jule: update use declarations

[mertcandav]

This PR updates Jule's use declaration system. The new system is much simpler and path-based. It is easy to switch. The manual recommends using an alias for each package. Source codes that do not have selection in use declarations and use alias can be easily adapted. This breaker is a change, though.

Pros of new use declarations;

• It has a positive contribution to compilation time. Analysis costs are less.
• It is mostly shorter and simpler.
• It supports readability with its new namespace/alias system.
• Supports automatic alias assignment by the compiler. Except in exceptional cases, the developer does not need to provide custom aliases.