FSE: Add links to the post title block when used in the query

[carolinan]

With full site editing enabled, the query /loop block renders the blocks that are placed inside it.

Compare
https://github.com/WordPress/gutenberg/blob/master/packages/block-library/src/query-loop/index.php#L32

With the latest post block that has links for the titles:
https://github.com/WordPress/gutenberg/blob/master/packages/block-library/src/latest-posts/index.php#L95

There needs to be context added so that theme developers can choose when the title
is a link text for a link leading to the content (archives), and when it is not (single view).

Two things that makes this more difficult is:

• Untitled posts/pages and providing an alternative way to reach the content. Should the "no title" text always be output? Today this is up to the theme author to decide by using filters.
• Theme authors don't always make this title a link even for archives. Sometimes, they design the theme in a way that there is only a read more link.

[carolinan]

What if there was a toggle control for the block (and the site title block as well), where you could turn the link on and off?