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docs(angular): add queries as signals content (#6472)

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# Queries as Signals
# Queries as Signals
A component or directive can define queries that find child elements and read values from their injectors. Developers most commonly use queries to retrieve references to components, directives, DOM elements, and more. There are two categories of query: view queries and content queries.
Visit the following resources to learn more:
- [@official@Angular Official Docs - Queries as Signals](https://angular.dev/guide/signals/queries)
- [@article@Querying made easy: exploring Angular's query signals](https://netbasal.com/querying-made-easy-exploring-angulars-query-signals-ca850b5db892)
- [@video@Angular signal queries with the viewChild() and contentChild() functions](https://www.youtube.com/watch?v=b35ts9OinBc)