docs(changelog): add changelog details for 0.2.0

CHANGELOG.md

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+# 0.2.0 (2023-01-23) - Initial Release
+
+## Supported Connectors
+
+- [ACI](https://www.aciworldwide.com/)
+- [Adyen](https://www.adyen.com/)
+- [Authorize.net](https://www.authorize.net/)
+- [Braintree](https://www.braintreepayments.com/)
+- [Checkout.com](https://www.checkout.com/)
+- [Cybersource](https://www.cybersource.com)
+- [Fiserv](https://www.fiserv.com/)
+- [Global Payments](https://www.globalpayments.com)
+- [Klarna](https://www.klarna.com/)
+- [PayU](https://payu.in/)
+- [Rapyd](https://www.rapyd.net/)
+- [Shift4](https://www.shift4.com/)
+- [Stripe](https://stripe.com/)
+- [Wordline](https://worldline.com/)
+
+
+## Supported Payment Methods
+
+- Cards No 3DS
+- Cards 3DS*
+- [Apple Pay](https://www.apple.com/apple-pay/)*
+- [Google Pay](https://pay.google.com)*
+- [Klarna](https://www.klarna.com/)*
+- [PayPal](https://www.paypal.com/)*
+
+## Supported Payment Functionalities
+
+- Payments (Authorize/Sync/Capture/Cancel)
+- Refunds (Execute/Sync)
+- Saved Cards
+- Mandates (No 3DS)*
+- Customers
+- Merchants
+- ConnectorAccounts
+
+\*May not be supported on all connectors