Apply fix for tiny documents

Author: tonybaloney

app/indexer/core/src/main/java/com/microsoft/openai/samples/indexer/parser/TextSplitter.java

@@ -56,6 +56,12 @@ public List<SplitPage> splitPages(List<Page> pages) {
         int length = allText.length();
         int start = 0;
         int end = length;
+
+        if (length <= maxSectionLength) {
+            splitPages.add(new SplitPage(findPage(start, pages), allText.toString()));
+            return splitPages;
+        }
+
         while (start + sectionOverlap < length) {
             int lastWord = -1;
             end = start + maxSectionLength;