docs: mi/170/add use cases (#531)

* docs: mi/170/add-use-cases

Added use case section to overview page.  Will link to remaining guides as they become available.

* docs: mi/170/add-use-cases

- Revised texts for peer-to-peer payments, e-commerce, and Web Monetization use cases, borrowing heavily from the use cases section from Rafiki docs.

- Added a BNPL use case

* docs: mi/170/add-use-cases

* docs: mi/170/add-use-cases

Added link to e-commerce example using the Open Payments SDK

* docs: mi/170/add-use-cases

Reran prettier even though I had it run the first time.

* docs: mi/170/add-use-cases

Updated peer-to-peer payments text.

* mi/170/add-use-cases

* docs: mi/170/add-use-case

* docs: mi/170/add-use-cases

docs/src/content/docs/introduction/overview.mdx

@@ -94,8 +94,4 @@ Buy Now and Pay Later (BNPL) plans allow customers to pay for high-priced purcha
 
 ### Web Monetization
 
-The <LinkOut href='https://webmonetization.org'>Web Monetization</LinkOut> is a new
-standard and API that allows website visitors to pay an amount they choose to a
-participating website with little to no interaction using Open Payments as the
-payment method. The site and the site visitor must have an Open Payments-enabled
-wallet address to receive and send payments.
+The <LinkOut href='https://webmonetization.org'>Web Monetization API</LinkOut> allows website visitors to pay an amount they choose to a participating website with little to no interaction using Open Payments as the payment method. The site and the site visitor must have an Open Payments-enabled wallet address to receive and send payments.