Replace beego/orm with dbx (#2693)

* Start migration to dbx package

* Fix annotations and bookmarks bindings

* Fix tests

* Fix more tests

* Remove remaining references to beego/orm

* Add PostScanner/PostMapper interfaces

* Fix importing SmartPlaylists

* Renaming

* More renaming

* Fix artist DB mapping

* Fix playlist updates

* Remove bookmarks at the end of the test

* Remove remaining `orm` struct tags

* Fix user timestamps DB access

* Fix smart playlist evaluated_at DB access

* Fix search3

persistence/sql_search.go

@@ -21,7 +21,7 @@ func (r sqlRepository) doSearch(q string, offset, size int, results interface{},
 		return nil
 	}
 
-	sq := r.newSelectWithAnnotation(r.tableName + ".id").Columns("*")
+	sq := r.newSelectWithAnnotation(r.tableName + ".id").Columns(r.tableName + ".*")
 	filter := fullTextExpr(q)
 	if filter != nil {
 		sq = sq.Where(filter)