Description

This RFC proposes adding support for custom key bindings in the REPL.

Some prior art:

• Julia: supports key bindings for actions like editing, cursor movement, and program control. Here's the full list of actions

• IPython: They also support multiple key bindings for a single action. Similar to how we have the right arrow and TAB to auto-complete a suggestion. They also have auto-closing pairs as "key bindings", to trigger the 'auto-close-parentheses' is mapped to the key (. Here's the full list of actions

We would also want to support having custom key bindings for current actions like Ctrl+O for inserting a new line, or right arrow for accepting a suggestion, or the TAB key to toggle the completions etc.

Would suggest reading the above lists of actions for further discussion on what we should support

Checklist

• I have read and understood the Code of Conduct.
• Searched for existing issues and pull requests.
• The issue name begins with RFC:.