[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#3546

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

content/applications/finance/fiscal_localizations/netherlands.rst

@@ -0,0 +1,23 @@
+Netherlands
+===========
+
+XAF Export
+----------
+
+With the Dutch accounting localization installed, you will be able to
+export all your accounting entries in XAF format. For this, you have to
+go in :menuselection:`Accounting --> Reporting --> General Ledger`, you
+define the entries you want to export using the filters (period, journals, ...)
+and then you click on the button **EXPORT (XAF)**.
+
+Dutch Accounting Reports
+------------------------
+
+If you install the Dutch accounting localization, you will have access
+to some reports that are specific to the Netherlands such as :
+
+-  Profit & Loss
+
+-  Tax Report (Aangifte omzetbelasting)
+
+-  Intrastat Report (ICP)