Release notes:

- vim: add Visual Block mode
([#984](https://github.com/zed-industries/community/issues/984)),
([#1415](https://github.com/zed-industries/community/issues/1415)).
- vim: add support for `a<object>` and `i<object>` in visual modes
- vim: fix scroll shortcuts (`ctrl-{f,b,d,u,e,y}`) in visual modes
- allow `shift-enter` to type a newline.