ZODB Components: erp5_trade: Migrate Documents, Interfaces and Mixins from filesystem (MR !1101).

* Remove TaxLine Document which was replaced by Trade Model Line a while ago.
* Keep {Delivery,Inventory,Order}{Cell,Line} on FS for now because of InventoryInteractor.
* About DeliveryRootSimulation Document migration to erp5_trade:
  + AccountingTransactionRootSimulationRule (erp5_accounting) inherited from
    it but as this is probably not actually used/useful, avoid depending on
    erp5_trade or refactoring but just copy/paste.
  + InvoiceRootSimulationRule inherited from it but as it is only used in
    erp5_invoicing (which already depends on erp5_trade) move it there.
    - erp5_configurator_standard_accounting_template: Add depend on erp5_invoicing.
* Move Documents used by several bt5 to erp5_core rather than add depends on erp5_core.
  Once migration of Products to ZODB Components will be finished, there will be moved to
  their appropriate bt5s as it would be complicated to reorganize bt5s too at this point.
  + Inventory: used by erp5_archive and erp5_accounting.
  + Order: used by erp5_project.
  + PackingList: used by erp5_publication.