Add helper function annotations for Rust snippets (#192)

Author: prrao87

docs/quickstart.mdx

@@ -145,7 +145,8 @@ The vector column holds 3-dimensional embeddings representing each character.
 To ingest the data into LanceDB, obtain data of the required shape
 and pass in the data object to the `create_table` method as shown below.
 Note that LanceDB tables require a schema. If you don't provide one, LanceDB
-will infer it from the data.
+will infer it from the data. For the Rust snippet, you can find the helper functions in the
+[code](https://github.com/lancedb/docs/blob/main/tests/rs/quickstart.rs).
 
 <CodeGroup >
     <CodeBlock filename="Python (sync)" language="Python" icon="python">
@@ -210,11 +211,10 @@ to be used downstream in your application.
   </CodeBlock>
 </Accordion>
 
-
 <Info>
 See the full code for these examples (including helper functions) in the
 `quickstart` file for the appropriate client language in the
-[docs repo](https://github.com/lancedb/docs/tree/main/tests).
+[files provided here](https://github.com/lancedb/docs/tree/main/tests).
 </Info>
 
 

docs/snippets/quickstart.mdx

@@ -40,7 +40,7 @@ export const RsQuickstartCreateTable = "// Define an arrow schema named adventur
 
 export const RsQuickstartCreateTableNoOverwrite = "table = db\n    .create_table(\"adventurers\", adventurers_to_reader(schema.clone(), &data))\n    .execute()\n    .await\n    .unwrap();\n";
 
-export const RsQuickstartDefineStruct = "// Define a struct representing the data schema\n#[derive(Debug, Clone, Serialize, Deserialize)]\nstruct Adventurer {\n    id: String,\n    text: String,\n    vector: [f32; 3],\n}\n";
+export const RsQuickstartDefineStruct = "// Define a struct representing the data schema\n#[derive(Debug, Clone, Serialize, Deserialize)]\nstruct Adventurer {\n    id: String,\n    text: String,\n    vector: [f32; 3],\n}\n\nfn adventurers_schema() -> Arc<Schema> {\n    Arc::new(Schema::new(vec![\n        Field::new(\"id\", DataType::LargeUtf8, false),\n        Field::new(\"text\", DataType::LargeUtf8, false),\n        Field::new(\n            \"vector\",\n            DataType::FixedSizeList(Arc::new(Field::new(\"item\", DataType::Float32, true)), 3),\n            false,\n        ),\n    ]))\n}\n";
 
 export const RsQuickstartOpenTable = "let table: Table = db.open_table(\"adventurers\").execute().await.unwrap();\n";
 

docs/tables/index.mdx

@@ -353,7 +353,8 @@ existing table named `camelot`.
 </CodeGroup>
 
 Prepare the new records to add. Here, we add two new magical characters
-via the `add` method.
+via the `add` method. For the Rust snippet, you can find the helper functions in the
+[code](https://github.com/lancedb/docs/blob/main/tests/rs/basic_usage.rs).
 
 <CodeGroup >
     <CodeBlock filename="Python" language="Python" icon="Python">

tests/rs/quickstart.rs

@@ -21,7 +21,6 @@ struct Adventurer {
     text: String,
     vector: [f32; 3],
 }
-// --8<-- [end:quickstart_define_struct]
 
 fn adventurers_schema() -> Arc<Schema> {
     Arc::new(Schema::new(vec![
@@ -34,6 +33,7 @@ fn adventurers_schema() -> Arc<Schema> {
         ),
     ]))
 }
+// --8<-- [end:quickstart_define_struct]
 
 type BatchIter = RecordBatchIterator<
     std::vec::IntoIter<std::result::Result<RecordBatch, arrow_schema::ArrowError>>,