[MOV] finance: move fiscal localisation pages and merge /overview/

The content written in the fiscal localisation pages are not only for
Accounting, but also for other apps such as Payroll and Point of Sales.
This commit moves the content to the "Finance" level, to better reflect
this reality, and merges the pages in the /overview/ folder in the main
category page.

closes odoo/documentation#3559

X-original-commit: ecbb755471
Signed-off-by: Castillo Jonathan (jcs) <jcs@odoo.com>

content/applications/finance/accounting/taxation/taxes/default_taxes.rst

@@ -19,8 +19,8 @@ Configuration
 =============
 
 **Default Taxes** are automatically set up according to the country selected at the creation of your
-database, or when you set up a :doc:`Fiscal Localization Package
-<../../fiscal_localizations/overview/fiscal_localization_packages>` for your company.
+database, or when you set up a :ref:`fiscal localization package <fiscal_localizations/packages>`
+for your company.
 
 To change your **Default Taxes**, go to :menuselection:`Accounting --> Configuration --> Settings
 --> Taxes --> Default Taxes`, select the appropriate taxes for your default **Sales Tax** and
@@ -37,4 +37,4 @@ To change your **Default Taxes**, go to :menuselection:`Accounting --> Configura
 
   - :doc:`taxes`
   - :doc:`fiscal_positions`
-  - :doc:`../../fiscal_localizations/overview/fiscal_localization_packages`
+  - :doc:`../../../fiscal_localizations`