fix: ts typings for sectionlist to mirror rn core types

[vonovak]

Please provide enough information so that others can review your pull request:

Motivation

the types for SectionList in RN core are:

interface SectionListProps<ItemT, SectionT = DefaultSectionT>

but the typings of the exported BottomSheetSectionList are BottomSheetSectionListProps<T> and do not allow passing the second parameter. This PR aligns the typings to be the same as in RN core

can be tested with:

import { SectionList as RNSectionList, Text } from 'react-native';
import React from 'react';
import BottomSheetSectionList from './BottomSheetSectionList';

type ItemType = {
  number: number;
};
type SectionsType = {
  title: string;
  data: Array<ItemType>;
};
export const TSTest = () => {
  const sections = [
    {
      title: 'Main dishes',
      data: [{ number: 1 }, { number: 2 }],
    },
    {
      title: 'side dishes',
      data: [{ number: 1 }, { number: 2 }],
    },
  ];
  return (
    <>
      <RNSectionList<ItemType, SectionsType>
        sections={sections}
        renderItem={props => <Text>{props.item}</Text>}
      />
      <BottomSheetSectionList<ItemType, SectionsType>
        sections={sections}
        renderItem={props => <Text>{props.item}</Text>}
      />
    </>
  );
};

[gorhom]

thanks !