Add Support For .view Endpoints

[LoganK]

While I'm not sure there's a definitive standard for Subsonic APIs, the .view suffix is often a component of it:

• http://www.subsonic.org/pages/api.jsp - Seems to be implicit and only documented in the Authentication example
• https://www.madsonic.org/pages/apiV2.jsp - Explicit

Servers:

• Ampache: Only supports with the suffix: https://github.com/ampache/ampache/blob/develop/public/rest/.htaccess.dist
• Navidrome: Supports both: https://github.com/navidrome/navidrome/blob/0c7c6ba02060c94302dedb649a8502a8f0da2991/server/subsonic/api.go#L232-L233

While I wouldn't propose changing the default behavior, it would be convenient to have the option. I should have a PR for you shortly.