feat: support `Document` type on update/remove etc

Currently:

``` py
table = ...
items = table.all()
... # work with items, than:
for item in items:
    table.update(item, doc_ids=[item.doc_id])
```

Expected:

``` py
table = ...
items = table.all()
... # work with items, than:
for item in items:
    table.update(item)
```