[ADD] payment_acquirers: add documentation for Mercado Pago

Task - 2704764

closes odoo/documentation#2242

Related: odoo/odoo#83957
Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>

content/applications/finance/payment_acquirers.rst

@@ -14,6 +14,7 @@ Payment acquirers (credit cards, online payments)
    payment_acquirers/authorize
    payment_acquirers/buckaroo
    payment_acquirers/flutterwave
+   payment_acquirers/mercado_pago
    payment_acquirers/mollie
    payment_acquirers/ogone
    payment_acquirers/paypal
@@ -94,6 +95,11 @@ Online payment acquirers
      - |V|
      -
      -
+   * - :doc:`Mercado Pago <payment_acquirers/mercado_pago>`
+     - Payment from the acquirer website
+     -
+     -
+     - 
    * - :doc:`Mollie <payment_acquirers/mollie>`
      - Payment from the acquirer website
      -
@@ -359,6 +365,7 @@ payment method... What best suit your needs.
    - :doc:`payment_acquirers/alipay`
    - :doc:`payment_acquirers/authorize`
    - :doc:`payment_acquirers/buckaroo`
+   - :doc:`payment_acquirers/mercado_pago`
    - :doc:`payment_acquirers/mollie`
    - :doc:`payment_acquirers/ogone`
    - :doc:`payment_acquirers/paypal`

content/applications/finance/payment_acquirers/mercado_pago.rst

@@ -0,0 +1,30 @@
+============
+Mercado Pago
+============
+
+`Mercado Pago <https://www.mercadopago.com/>`_ is an online payment provider covering several
+countries, currencies and payment methods in Latin America.
+
+.. _payment_acquirers/mercado_pago/configure_dashboard:
+
+Configuration on Mercado Pago Dashboard
+=======================================
+
+#. Log into `Mercado Pago Dashboard <https://www.mercadopago.com.mx/developers/panel>`_ 
+   and go to your **Application** or *create* a new one.
+#. Go to :menuselection:`Production Credentials` or :menuselection:`Credentials` if your are in
+   a *Test* environment and copy your **Access Token**
+
+.. _payment_acquirers/mercado_pago/configure_odoo:
+
+Configuration on Odoo
+=====================
+
+#. :ref:`Navigate to the payment acquirer Mercado Pago <payment_acquirers/add_new>` and change its
+   state to :guilabel:`Enabled`.
+#. In the :guilabel:`Credentials` tab, fill the :guilabel:`Access Token` with the value 
+   you saved at the step :ref:`payment_acquirers/mercado_pago/configure_dashboard`.
+#. Configure the rest of the options to your liking.
+
+.. seealso::
+   - :doc:`../payment_acquirers`