[MOV] accounting: restructuration of the accounting documentation

This commit improves the structure of the accounting documentation by
- reducing the levels necessary to reach the information
- grouping some docs
- moving content to their parent category page (content in all levels)
- renaming some sections to reflect the structure of the app better

task-3330093

closes odoo/documentation#4422

Signed-off-by: Castillo Jonathan (jcs) <jcs@odoo.com>

content/applications/general/users/companies.rst

@@ -84,11 +84,10 @@ Inter-Company Transactions
 
 First, make sure each one of your companies is properly set in relation to:
 
-- :doc:`Chart of Accounts
-  <../../finance/accounting/getting_started/initial_configuration/chart_of_accounts>`
-- :doc:`Taxes <../../finance/accounting/taxation/taxes/default_taxes>`
-- :doc:`Fiscal Positions <../../finance/accounting/taxation/taxes/fiscal_positions>`
-- :doc:`Journals <../../finance/accounting/bank/setup/bank_accounts>`
+- :doc:`Chart of Accounts <../../finance/accounting/get_started/chart_of_accounts>`
+- :doc:`Taxes <../../finance/accounting/taxes>`
+- :doc:`Fiscal Positions <../../finance/accounting/taxes/fiscal_positions>`
+- :doc:`Journals <../../finance/accounting/bank>`
 - :doc:`Fiscal Localizations <../../finance/fiscal_localizations>`
 - :doc:`Pricelists <../../sales/sales/products_prices/prices/pricing>`
 
@@ -130,4 +129,4 @@ at an invoice/bills level or at a sales/purchase orders level.
 
 .. seealso::
    - :doc:`Multi-company Guidelines </developer/howtos/company>`
-   - :doc:`../../finance/accounting/others/multi_currency`
+   - :doc:`../../finance/accounting/get_started/multi_currency`