Links of affected pages in Plone Documentation, if any.

• https://6.docs.plone.org/backend/search.html

Description

Migrate content from Plone 5 docs.

• https://5.docs.plone.org/develop/plone/searching_and_indexing/index.html
• https://5.docs.plone.org/develop/plone/searching_and_indexing/catalog.html
• https://5.docs.plone.org/develop/plone/searching_and_indexing/query.html
• https://5.docs.plone.org/develop/plone/searching_and_indexing/external-catalogs.html
• https://5.docs.plone.org/develop/plone/searching_and_indexing/indexing.html
• https://5.docs.plone.org/external/plone.app.dexterity/docs/advanced/catalog-indexing-strategies.html

The last two need to be merged, as they contain duplicate information, but both have some information the other lacks.

The files are already converted to MyST on the 5.2-myst branch.

https://github.com/plone/documentation/tree/5.2-myst/5.2-myst