🌍 Add new payment provider adapters (by country)

🌍 Context

EasySwitch aims to provide a unified SDK for payment integrations, making it easier to use multiple providers without vendor lock-in.
To achieve this, we want to support as many payment aggregators as possible, especially those that are popular in specific countries/regions.

This issue is open to all contributors who want to add a payment adapter for a provider from their country 🚀

✅ How to contribute

• Pick a provider from the checklist below OR suggest another one from your country.
• Implement a new adapter in easyswitch/integrators/.
• Make sure it follows the BaseAdapter interface (see easyswitch/adapters/base.py).
• Add minimal tests and documentation for the adapter.
• Open a PR referencing this issue.

📋 Suggested providers (feel free to add more!)

• Paystack (Nigeria, Ghana)
• Flutterwave (Africa-wide)
• MTN Mobile Money (MoMo) (West & Central Africa)
• Orange Money (West Africa)
• M-Pesa (Kenya, Tanzania, etc.)
• PayPal (Global)
• Stripe (Global)
• Square (US, Global)
• Klarna (Europe)
• WeChat Pay (China)
• Alipay (China)

💡 Don’t see your provider? Add it!
This checklist is not exhaustive — you are encouraged to propose any aggregator from your country that isn’t yet supported.

📚 Resources

• Base adapter class: easyswitch/adapters/base.py
• Contribution guide: here

🎉 Hacktoberfest-friendly

This issue is perfect for Hacktoberfest contributors:

• Each adapter can be added in a separate PR.
• Contributions can cover code, docs, or tests.
• You don’t need to be an expert — just follow the base adapter structure.

Let’s make EasySwitch the go-to open-source SDK for global payment integrations 💜

Choose an unsupported payment provider, then read easyswitch/adapters/base.py and CONTRIBUTING.md before examining existing adapters in easyswitch/integrators/. Implement the provider adapter against the BaseAdapter interface, add minimal tests and documentation, and confirm the contribution is ready for a PR referencing this issue.