Add PP API redirects (#1565)

Author: oliwiapolec

_redirects

@@ -62,6 +62,7 @@
 /getting-started/app-guides/onboarding-and-settings/*   /docs/getting-started/app-guides/onboarding/:splat 301
 /extending-chat-widget/visitor-sdk/*  /docs/extending-chat-widget/customer-sdk/:splat 301
 /messaging/chat-sdk/*  /docs/messaging/node-sdk/:splat 301
+/monetization/partner-program-api/*  /docs/partner-program/partner-api/:splat 301
 
 # Redirect images so can work on netlify and /docs domain
 /docs/images/*  /images/:splat  200