[FEATURE] Add support in vim mode for `s` and `S`.

Preflight Checklist

• [x] I have searched existing requests and this feature hasn't been requested yet
• [x] This is a single feature request (not multiple features)

Problem Statement

The s and S vim key bindings are not implemented, which adds friction for anyone with muscle memory that relies on them.

Proposed Solution

s can be implemented as cl
S can be implemented as cc
Both cl and cc are already implemented, so these can presumably just be aliases that trigger the same underlying logic.

Alternative Solutions

_No response_

Priority

Low - Nice to have

Feature Category

Configuration and settings

Use Case Example

_No response_

Additional Context

_No response_