Add Solr search: EXT:solr 14 integration and JSON search endpoint

Apache Solr 10 runs on a dedicated VPS behind a Caddy HTTPS proxy
(vitecsolr.evomedien.de) because the managed webserver only allows
outgoing standard ports. Credentials stay out of git: the site config
carries %env()% placeholders resolved via putenv() in the git-ignored
config/system/additional.php.

- composer: apache-solr-for-typo3/solr 14.0.0-RC1 (the only line
  compatible with TYPO3 14; final 14.0.0 will arrive via composer update)
- config.yaml: read connection https/443, core_en per language,
  env placeholder credentials; .gitignore covers additional.php
- setup.typoscript: config.index_enable = 1 (page indexing silently
  refuses without it), solr_pi_results JSON renderer registration,
  results highlighting, and content field extraction from tt_content
  rows - the headless JSON output has no TYPO3SEARCH markers, so the
  default page content extraction indexed an empty content field
- SearchJsonRenderer (renderer #27): JSON output for the search plugin
  on /search. GET q/page in; { query, page, resultsPerPage, numFound,
  totalPages, results[], suggestions } out. Disables the page cache per
  request: config.no_cache is gone in TYPO3 v14, and q/page are
  excluded from cHash, so cached variants would collide
- ext_localconf.php: q and page added to cacheHash excludedParameters
- SolrIndexCommand (vitec:solr-index): works the index queue from the
  CLI with connection diagnostics and a --debug single-step mode -
  EXT:solr 14 ships no console commands and the backend button indexes
  one item per click

config/sites/vitec/config.yaml

@@ -1,4 +1,4 @@
-base: /
+base: 'https://dev.vitec.com/'
 dependencies:
   - typo3/fluid-styled-content
   - typo3/fluid-styled-content-css
@@ -20,6 +20,10 @@ dependencies:
   - georgringer/news-sitemap
   - georgringer/news-recordlinks
   - vitec/columns
+  - apache-solr-for-typo3/solr
+  - apache-solr-for-typo3/solr-open-search
+  - apache-solr-for-typo3/solr-stylesheets
+  - apache-solr-for-typo3/solr-bootstrap-css
 frontendBase: ''
 headless: 1
 languages:
@@ -31,6 +35,7 @@ languages:
     locale: en_US.UTF-8
     navigationTitle: English
     flag: us
+    solr_core_read: core_en
 rootPageId: 1
 routeEnhancers:
   ProductPlugin:
@@ -61,7 +66,8 @@ routeEnhancers:
     extension: News
     plugin: Pi1
     routes:
-      - routePath: '/{news-title}'
+      -
+        routePath: '/{news-title}'
         _controller: 'News::detail'
         _arguments:
           news-title: news
@@ -91,4 +97,16 @@ routeEnhancers:
         type: PersistedAliasMapper
         tableName: tx_vitec_domain_model_usecase
         routeFieldName: slug
+solr_enabled_read: true
+solr_host_read: vitecsolr.evomedien.de
+solr_host_write: localhost
+solr_path_read: /
+solr_path_write: /
+solr_port_read: '443'
+solr_port_write: '8983'
+solr_scheme_read: https
+solr_scheme_write: ''
+solr_use_write_connection: false
+solr_username_read: '%env(SOLR_USERNAME)%'
+solr_password_read: '%env(SOLR_PASSWORD)%'
 websiteTitle: ''