User should be able to set where a scrollview rests when scrolling to next step

Is your feature request related to a problem? Please describe.

Scrollview doesn't currently allow the user to dictate where on the screen an element within a scrollview should display. It defaults to the middle of the screen

Describe the solution you'd like

A prop that can be passed to the step component that determines the scrollTo function params for the given step.

See: https://github.com/mohebifar/react-native-copilot/blob/021f9c49747b298c2a1e531a305ca8f50726e039/src/contexts/CopilotProvider.tsx#L111-L112

A simple solve could be allowing the user to pass in this offset value per-step.

Describe alternatives you've considered

• Interacting with the scrollRef before calling handleNext so that it's scrolled into location without any library changes. This doesn't work as the scrollview is reset by the library.
• The library doesn't manipulate the scrollview outside of finding nodes / steps, so the user could manually call scroll functions before handleNext.

Teachability, Documentation, Adoption, Migration Strategy

Happy to raise a PR with some documentation + implementation if it's of use.

Start in src/contexts/CopilotProvider.tsx at the scrollTo call referenced in the issue, then trace how step props are defined and passed to the step component. Add a per-step value that controls the scrollTo parameters, and update the documentation so users can configure where the target rests when advancing to the next step.