Insert Code Cell doesn't split up cell when applied inside code cell

[EmilHvitfeldt]

Positron Version:

Positron Version: 2023.10.0 (Universal) build 6
Code - OSS Version: 1.82.0
Commit: 9e7968d
Date: 2023-10-05T03:09:32.335Z
Electron: 25.8.0
ElectronBuildId: undefined
Chromium: 114.0.5735.289
Node.js: 18.15.0
V8: 11.4.183.29-electron.0
OS: Darwin arm64 22.6.0

Steps to reproduce the issue:

1. Write code cell with multiple lines (3+)
2. place cursor on one of middle lines
3. run Quarto: Insert Code Cell

What did you expect to happen?

I expected that this followed RStudio behavior and would split the original code cell in 2 like image below:

Were there any error messages in the output or Developer Tools console?

Nope

[jmcphers]

Tracked in #1330.