Add PayDunya payment provider integration

- Implemented PayDunya payment provider with necessary models, controllers, and views.
- Added configuration files for Docker and Odoo setup.
- Included .gitignore for Python and Odoo specific files.

addons/payment_paydunya/views/payment_paydunya_views.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+  <!-- Form view for PayDunya payment provider -->
+  <record id="payment_provider_paydunya_form" model="ir.ui.view">
+    <field name="name">payment.provider.paydunya.form</field>
+    <field name="model">payment.provider</field>
+    <field name="inherit_id" ref="payment.payment_provider_form"/>
+    <field name="arch" type="xml">
+      <xpath expr="//page[@name='credentials']" position="inside">
+        <group id="paydunya_credentials" invisible='code != "paydunya"'>
+          <h2>PayDunya Credentials</h2>
+          <field name="environment"/>
+          <field name="paydunya_master_key" password="True"/>
+          <field name="paydunya_public_key"/>
+          <field name="paydunya_private_key" password="True"/>
+          <field name="paydunya_token" password="True"/>
+        </group>
+      </xpath>
+    </field>
+  </record>
+</odoo>