Epic - Swap old templates for FSE template

[AmnestyAM]

Sprints allocated

Number of sprints: 1 (2+ for all of them but we will make a start)
Link to sprint if known: TBC

Goals

• start swapping old templates for FSE template
• This will allow us to build FSE "templates" for the really big patterns such as Issue pages, that were too big for patterns but built as patterns anyway.

Think about (optional)

• Tickets for translations

• Tickets for content

• home page

• archive template

• single post

• page template

• Side bar template part