Improve search syntax page (#1770)

Remove non-searchable fields from syntax site, do no translate field names, use field name for title if no translation is available, refactor syntax page to respect error states

scm-webapp/src/test/java/sonia/scm/search/SearchableTypesTest.java

@@ -0,0 +1,64 @@
+/*
+ * MIT License
+ *
+ * Copyright (c) 2020-present Cloudogu GmbH and Contributors
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+package sonia.scm.search;
+
+
+import lombok.Value;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+import java.util.stream.Collectors;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class SearchableTypesTest {
+
+  @Test
+  void shouldNotReturnStoredOnlyFields() {
+    LuceneSearchableType luceneSearchableType = SearchableTypes.create(IndexedObject.class);
+    List<String> fields = luceneSearchableType.getFields()
+      .stream()
+      .map(LuceneSearchableField::getName)
+      .collect(Collectors.toList());
+
+    assertThat(fields).containsOnly("searchable", "tokenized");
+  }
+
+  @Value
+  @IndexedType
+  public static class IndexedObject {
+
+    @Indexed(type = Indexed.Type.STORED_ONLY)
+    String storedOnly;
+
+    @Indexed
+    String searchable;
+
+    @Indexed
+    String tokenized;
+
+  }
+
+}