Option to not move cursor during scroll (`<C-d>` / `<C-u>`)

Is your feature request related to a problem? Please describe.
When scrolling using ctrl + d/ctrl + u, the cursor is moved around together with the scroll, staying always in the same position relative to the screen, and not in the line it was originally.

Describe the solution you'd like
I would like it it stay at the same place always, just like regular scrolling with the mouse. There's actually an option for this when making a key-bind for scrolling in VSCode, but I would like it implemented in Vim scrolling.

Describe alternatives you've considered
The current alternative I'm using is making a custom key-bind in VSCode which has this option, but I would like for us to have this option in the Vim plugin so that we don't need to override it or create a different hotkey.

Start by locating the Vim keybinding and scroll-command handling for and in the TypeScript extension. Compare its cursor behavior with regular mouse scrolling and the VS Code behavior described in the issue. Done means an option can preserve the cursor's original document position while scrolling, without requiring a replacement keybinding.