* Add reverse search functionality
* Change keybindings for extend to be in select mode, incorporate Movement and Direction enums
* Fix accidental revert of #948 in rebase
* Add reverse search to docs, clean up mismatched whitespace
* Reverse search optimization
* More optimization via github feedback
* initial implementation of global search
* use tokio::sync::mpsc::unbounded_channel instead of Arc, Mutex, Waker poll_fn
* use tokio_stream::wrappers::UnboundedReceiverStream to collect all search matches
* regex_prompt: unified callback; refactor
* global search doc
Regression due to #635 where escape key in insert mode
would not exit normal mode. This happened due to hard
coding the escape key to cancel a sticky keymap node.
* Implement shell interaction commands
* Use slice instead of iterator for shell invocation
* Default to `sh` instead of `$SHELL` for shell commands
* Enforce trailing comma in `commands` macro
* Use `|` register for shell commands
* Move shell config to `editor` and use in command
* Update shell command prompts
* Remove clone of shell config
* Change shell function names to match prompts
* Log stderr contents upon external command error
* Remove `unwrap` calls on potential common errors
`shell` will no longer panic if:
* The user-configured shell cannot be found
* The shell command does not output UTF-8
* Remove redundant `pipe` parameter
* Rename `ShellBehavior::None` to `Ignore`
* Display error when shell command is used and `shell = []`
* Document shell commands in `keymap.md`