wildcard loader options are not documented for columns, other features missing #4390
Description
in https://docs.sqlalchemy.org/en/latest/changelog/migration_09.html#class-specific-wildcards we talk about the new wildcard feature, but that's not the main docs. There's a little bit of wildcard mentioned at https://docs.sqlalchemy.org/en/latest/orm/loading_relationships.html?highlight=wildcard#wildcard-loading-strategies. But nothing for columns at https://docs.sqlalchemy.org/en/latest/orm/loading_columns.html - there's "load_only()" which is what uses wildcards behind the scenes, but it should be mentioned. but then what gets really weird is, what's this? https://github.com/sqlalchemy/sqlalchemy/blob/master/lib/sqlalchemy/orm/strategy_options.py#L495 "dot-star" ? what's that ? I don't even know what it does and I implemented it. no docs anywhere for that? that's kind of a problem b.c i dont even know what it does.