feat: Add files_via_content example for LlamaCloud retrieval

.changeset/thick-ways-visit.md

@@ -0,0 +1,5 @@
+---
+"@llamaindex/examples": patch
+---
+
+Add files_via_content example for LlamaCloud retrieval

examples/cloud/query.ts

@@ -12,7 +12,8 @@ async function main() {
   });
 
   const queryEngine = index.asQueryEngine({
-    similarityTopK: 5,
+    // retrieve the whole content of a file instead of just chunks of the file
+    retrieval_mode: "files_via_content",
   });
 
   const rl = readline.createInterface({ input, output });