More API progress

This time mainly helper functions for converting an account and
associated types into their API representation

server/apiLinstromTypes.go

@@ -35,7 +35,7 @@ type linstromNote struct {
 }
 
 type linstromOriginServer struct {
-	Id          int                    `jsonapi:"primary,origins"`
+	Id          uint                   `jsonapi:"primary,origins"`
 	CreatedAt   time.Time              `jsonapi:"attr,created_at"`
 	UpdatedAt   *time.Time             `jsonapi:"attr,updated_at,omitempty"`
 	ServerType  string                 `jsonapi:"attr,server_type"` // one of "Linstrom", "Mastodon", "Plemora", "Misskey" or "Wafrn"