Flip submit and newline key bindings #4952

Describe the feature or problem you'd like to solve

To often I submit unfinished multiline prompts

Proposed solution

Make it configurable. Allow users to define what the following keybindings do:
what the return shift+return or command+return or ctrl+return do

As there are other situations where there is a similar newline vs submit paradigm (JIRA, confluence, slack, etc.), it's important to have the opportunity to train muscle memory to one and not have to rethink every time on what is submit in this context.

Example prompts or workflows

No response

Additional context

No response