Fixes #91

The approach is to check the current cursor line number: If :-

1. cursor line number is above first visible line number -> scroll up to cursor position
2. cursor line number is below last visible line number -> scroll down to cursor position
3. else cursor is already in visible bounds of first and last visible line -> scroll not required

There is some maths involved to find cursor position, first visible line, last visible line.

1. Cursor position -> we get this using TextLayoutResult.getLineForOffset() and pass the
2. firstVisibleLineNumber -> currentScrollValue of parent scrollable layout - scrollOffset. Here scrollOffset is the height of the composable above description textField.
3. lastVisibleLineNumber -> currentScrollValue of parent scrollable layout + contentSize - scrollOffset. Here content size is the height of scrollable parent composable, scrollOffset is same as before.

Final Result: