Introducing fts client into codebase

modules/restserver/src/main/resources/reference.conf

@@ -84,6 +84,10 @@ docspell.server {
     }
   }
 
+  fulltext-search {
+    enabled = true
+  }
+
   # Configuration for the backend.
   backend {
     # Enable or disable debugging for e-mail related functionality. This
@@ -143,5 +147,13 @@ docspell.server {
       # By default all files are allowed.
       valid-mime-types = [ ]
     }
+
+    # Configuration of the full-text search engine.
+    full-text-search {
+      enabled = true
+      solr = {
+        url = "http://localhost:8983/solr/docspell_core"
+      }
+    }
   }
 }