Add Lithuanian to processing languages

SOLR doesn't support Lithuanian, maybe it can be added via plugins. A
manual setup of solr is required then. It has been added with basic
support.

Closes: #1540

modules/fts-solr/src/main/scala/docspell/ftssolr/SolrSetup.scala

@@ -133,7 +133,18 @@ object SolrSetup {
             "Add hungarian",
             addContentField(Language.Hungarian)
           ),
-          SolrMigration.reIndexAll(20, "Re-Index after adding hungarian content field")
+          SolrMigration.reIndexAll(20, "Re-Index after adding hungarian content field"),
+          SolrMigration[F](
+            21,
+            "Add new field type for lithuanian content",
+            addFieldType(AddFieldType.textLit)
+          ),
+          SolrMigration[F](
+            22,
+            "Add lithuanian",
+            addContentField(Language.Lithuanian)
+          ),
+          SolrMigration.reIndexAll(23, "Re-Index after adding lithuanian content field")
         )
 
       def addFolderField: F[Unit] =
@@ -275,6 +286,17 @@ object SolrSetup {
       )
     )
 
+    val textLit = AddFieldType(
+      "text_lt",
+      "solr.TextField",
+      Analyzer(
+        Tokenizer("solr.StandardTokenizerFactory", Map.empty),
+        List(
+          Filter("solr.LowerCaseFilterFactory", Map.empty)
+        )
+      )
+    )
+
     final case class Filter(`class`: String, attr: Map[String, String])
     final case class Tokenizer(`class`: String, attr: Map[String, String])
     final case class Analyzer(tokenizer: Tokenizer, filter: List[Filter])