chore(Cross): [IOAPPX-322] Update the entire `Assistance` section with the new DS components

[dmnplb]

[!warning] This PR depends on:

• https://github.com/pagopa/io-app-design-system/pull/290
• https://github.com/pagopa/io-app-design-system/pull/291
• https://github.com/pagopa/io-app-design-system/pull/294

Short description

This PR updates the entire Assistance section with the new DS components.

List of changes proposed in this pull request

• Remove BaseScreenComponent from existent screens
• Handle the different headers with react-navigation
• Add the new components, like FooterActions or IOScrollViewWithLargeHeader to replace the legacy components
• Use FlatList with appropriate ListItem… or AccordionItem components instead of .map() and custom components
• Update IOScrollViewWithLargeHeader to include a section reference above the title
• Use OperationResultScreenContent to render the empty state when there are no open requests

Open issues

• AccordionItem can't handle markdown with links yet. The content is available as Markdown text not rendered correctly
• PanicMode and other error screens still do not have updates

Preview

First page	Choose category	Ask permissions

How to test

Test different Assistance flows from different sections