Create Inventory Module Skeleton

[okorshenko]

Module name: Inventory
Edition: Community Edition

Acceptance Criteria

• Module skeleton is created (module config, composer.json, README, license, module can be installed)

[maghamed]

why do we call it warehouse? and warehouse management?
Source is more precise word for this, because small merchants don't work with warehouses, that's naming appropriate for bit EE merchants
In our case this is a source, because it unites all possible kind of stocks