Add field to cover tag relations (tag_relation_type)

Close #29

src/CsvxmlAvailableFields.php

@@ -1276,7 +1276,7 @@ public function __construct(string $lang) {
 
         for ($i = 1; $i <= 10 * self::GENERAL_FIELD_MULTIPLIER; $i++) {
 
-            $availableFields[$tlLoader->tl("overview", "overview", 'tags')]["tag{$i}"] = new FieldEntry(
+            $availableFields[$tlLoader->tl("overview", "overview", 'tags')]["tag" . $i] = new FieldEntry(
                 false,
                 [],
                 [],
@@ -1284,6 +1284,14 @@ public function __construct(string $lang) {
                 $tlLoader->tl("overview", "overview", 'tags'),
                 "",
             );
+            $availableFields[$tlLoader->tl("overview", "overview", 'tags')]["tag_relation_type" . $i] = new FieldEntry(
+                false,
+                MDTagRelationType::caseNames(),
+                ["tag" . $i],
+                '',
+                $tlLoader->tl("object_addendum", "object_add", 'tag_relation_type'),
+                $tlLoader->tl("object_addendum", "object_add", 'tag_relation_type_explica'),
+            );
 
         }