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/analysis/src/main/scala/docspell/analysis/date/DateFind.scala

@@ -52,7 +52,7 @@ object DateFind {
       } else text
 
     TextSplitter
-      .splitToken(stext, " -\t.,\n\r/年月日".toSet)
+      .splitToken(stext, " -\t.,\n\r/年月日md".toSet)
       .filter(w => lang != Language.Latvian || w.value != "gada")
       .filter(w => lang != Language.Spanish || w.value != "de")
   }
@@ -105,6 +105,7 @@ object DateFind {
         case Language.Latvian    => dmy.or(lavLong).or(ymd)
         case Language.Japanese   => ymd
         case Language.Hebrew     => dmy
+        case Language.Lithuanian => ymd
       }
       p.read(parts) match {
         case Result.Success(sds, _) =>

modules/analysis/src/main/scala/docspell/analysis/date/MonthName.scala

@@ -56,6 +56,8 @@ object MonthName {
         japanese
       case Language.Hebrew =>
         hebrew
+      case Language.Lithuanian =>
+        lithuanian
     }
 
   private val numbers = List(
@@ -341,4 +343,19 @@ object MonthName {
     List("XI", "nov", "november"),
     List("XII", "dec", "december")
   )
+
+  private val lithuanian = List(
+    List("sausis", "sausio", "saus"),
+    List("vasaris", "vasario", "vas"),
+    List("kovas", "kovo", "kov"),
+    List("balandis", "balandžio", "bal"),
+    List("gegužis", "gegužės", "geg"),
+    List("birželis", "birželio", "birž"),
+    List("liepa", "liepos", "liep"),
+    List("rugpjūtis", "rugpjūčio", "rugp"),
+    List("rugsėjis", "rugsėjo", "rugs"),
+    List("spalis", "spalio", "spal"),
+    List("lapkritis", "lapkričio", "lapkr"),
+    List("gruodis", "gruodžio", "gruod")
+  )
 }

modules/analysis/src/test/scala/docspell/analysis/date/DateFindTest.scala

@@ -191,7 +191,6 @@ class DateFindTest extends FunSuite {
         )
       )
     )
-    println(DateFind.splitWords("2021-11-19", Language.Spanish).toList)
     assertEquals(
       DateFind
         .findDates("2021-11-19", Language.Spanish)
@@ -204,4 +203,32 @@ class DateFindTest extends FunSuite {
       )
     )
   }
+
+  test("find lithuanian dates") {
+    assertEquals(
+      DateFind
+        .findDates(
+          "Some text in lithuanian 2022 m. gegužės 21 d. and stuff",
+          Language.Lithuanian
+        )
+        .toVector,
+      Vector(
+        NerDateLabel(
+          LocalDate.of(2022, 5, 21),
+          NerLabel("2022 m. gegužės 21", NerTag.Date, 24, 42)
+        )
+      )
+    )
+    assertEquals(
+      DateFind
+        .findDates("2021-11-19", Language.Lithuanian)
+        .toVector,
+      Vector(
+        NerDateLabel(
+          LocalDate.of(2021, 11, 19),
+          NerLabel("2021-11-19", NerTag.Date, 0, 10)
+        )
+      )
+    )
+  }
 }