feat: Add Google Pay Example

[hamzanasir]

This PR aims to add an example for creating and processing a one-time google pay transaction with the v6 PayPal SDK and the google pay SDK.

[gregjopa]

@hamzanasir can you run prettier locally? Looks like CI is failing because of code formatting.

[hamzanasir]

@gregjopa Thanks for calling that out! I think my editor wasn't auto-formatting because we don't have a .prettierrc file in the repo. I added an empty one for now since I think this is an issue other's have run into as well.

[gregjopa]

@gregjopa Thanks for calling that out! I think my editor wasn't auto-formatting because we don't have a .prettierrc file in the repo. I added an empty one for now since I think this is an issue other's have run into as well.

Thanks @hamzanasir. I like adding a default .prettierrc file to root of the project to tell editors to use the default prettier settings when formatting on save. Great improvement.

[gregjopa]

Nit: can we name this getPayPalOrderPayload to help clarify that its not doing an ORDER GET operation with the API?

Suggested change

	const orderPayload = getPayPalOrder(purchaseAmount);
	const orderPayload = getPayPalOrderPayload(purchaseAmount);

[hamzanasir]

Another great suggestion. I think that's an important clarification to make 🙂

[gregjopa]

Awesome work @hamzanasir! I left some minor comments about function names.

[EvanReinstein]