SOLR-18227 - Add native support for NamedQueries in Solr

[squallsama]

Adds _name local-param support to 8 core query parsers so any query clause can be labelled for post-search introspection via NamedMatches:

term, terms, bool, lucene, prefix, dismax, edismax, fuzzy

Introduces MatchedQueriesComponent: a SearchComponent activated by matched_queries=true (alias mq=true) that performs a lightweight second pass over the top-N hits using Weight.matches() and reports which named clauses fired, both per-document and as a summary.

https://issues.apache.org/jira/browse/SOLR-18227

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