Shows the default site info line after the footer template part
content. Also adds header and footer tags to corresponding template
parts to bring them closer to overall theme's structure.
FSE contant will always be defined due to the fact that this
plugin bundles other functionality (SPT). Because of that we
can't rely on it to determine if this feature has been activated.
This adds required functionality to support rendering FSE header and
footer on all site pages (static and dynamic). It's also includes the
data population functionality, which has now been removed from the plugin
and will be delegated to each theme for maximum flexibility.
