Fix type-checking errors in snippets (code only, no .md)

This commit both:
- Fixes pre-existing mistakes in snippets, aka wrong code samples.
- Adds hidden (`@hide`) statements that do not appear in the docs,
  but satisfy typecheckers.

qdrant-landing/content/documentation/headless/snippets/create-payload-index/integer-with-params/go.go

@@ -12,14 +12,16 @@ func Main() {
 		Port: 6334,
 	})
 
+	if err != nil { panic(err) } // @hide
+
 	client.CreateFieldIndex(context.Background(), &qdrant.CreateFieldIndexCollection{
 		CollectionName: "{collection_name}",
 		FieldName:      "name_of_the_field_to_index",
 		FieldType:      qdrant.FieldType_FieldTypeInteger.Enum(),
 		FieldIndexParams: qdrant.NewPayloadIndexParamsInt(
 			&qdrant.IntegerIndexParams{
-				Lookup: false,
-				Range:  true,
+				Lookup: qdrant.PtrOf(false),
+				Range:  qdrant.PtrOf(true),
 			}),
 	})
 }

qdrant-landing/content/documentation/headless/snippets/create-payload-index/integer-with-params/rust.rs

@@ -1,8 +1,7 @@
-use qdrant_client::qdrant::{
-    payload_index_params::IndexParams, CreateFieldIndexCollectionBuilder, FieldType,
-    IntegerIndexParams, PayloadIndexParams,
-};
 use qdrant_client::Qdrant;
+use qdrant_client::qdrant::{
+    CreateFieldIndexCollectionBuilder, FieldType, IntegerIndexParamsBuilder,
+};
 
 pub async fn main() -> anyhow::Result<()> {
     let client = Qdrant::from_url("http://localhost:6334").build()?;
@@ -14,12 +13,7 @@ pub async fn main() -> anyhow::Result<()> {
                 "name_of_the_field_to_index",
                 FieldType::Integer,
             )
-            .field_index_params(PayloadIndexParams {
-                index_params: Some(IndexParams::IntegerIndexParams(IntegerIndexParams {
-                    lookup: false,
-                    range: true,
-                })),
-            }),
+            .field_index_params(IntegerIndexParamsBuilder::new(false, true).build()),
         )
         .await?;