Add dynamic favicon for trust center using file API

Use the trust center's logo as favicon via the public file API URL,
falling back to the default favicon when no logo is configured.

Signed-off-by: Bryan Frimin <bryan@getprobo.com>

pkg/server/trust/trust.go

@@ -31,6 +31,7 @@ type (
 		Title       string
 		Description string
 		OGURL       string
+		FaviconURL  string
 	}
 
 	HeadDataFunc func(r *http.Request) HeadData