**What**
Update the `MedusaService` class, factory and types to remove the concept of main modules. The idea being that all method will be explicitly named and suffixes to represent the object you are trying to manipulate.
This pr also includes various fixes in different modules
Co-authored-by: Stevche Radevski <4820812+sradevski@users.noreply.github.com>
Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>
* feat: Add a simple configurable notifications subscriber that is configurable
* Proposal on awaiting all subscribers to run
* fix: Clean up wait subscribers util and notifications test
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Co-authored-by: adrien2p <adrien.deperetti@gmail.com>
