feat(sidekick): Add very simple RPC samples for simple methods

Author: amanda-tarafa

internal/sidekick/rust/templates/common/client_method_preamble.mustache

@@ -28,6 +28,7 @@ limitations under the License.
 /// [user guide]: https://googleapis.github.io/google-cloud-rust/
 /// [working with long-running operations]: https://googleapis.github.io/google-cloud-rust/working_with_long_running_operations.html
 {{/OperationInfo}}
+{{> /templates/common/client_method_samples/client_method_sample}}
 {{#Deprecated}}
 #[deprecated]
 {{/Deprecated}}

internal/sidekick/rust/templates/common/client_method_samples/builder_fields.mustache

@@ -0,0 +1,16 @@
+{{!
+Copyright 2025 Google LLC
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    https://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+}}
+///         /* set fields */

internal/sidekick/rust/templates/common/client_method_samples/client_method_sample.mustache

@@ -0,0 +1,42 @@
+{{!
+Copyright 2025 Google LLC
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    https://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+}}
+{{#IsSimple}}
+///
+/// # Example
+/// ```
+/// # use {{Service.Model.Codec.PackageNamespace}}::client::{{Service.Codec.Name}};
+/// async fn sample(
+{{> /templates/common/client_method_samples/parameters}}
+/// ) -> gax::Result<()> {
+{{#ReturnsEmpty}}
+///     client
+///         .{{Codec.Name}}()
+{{> /templates/common/client_method_samples/builder_fields}}
+///         .send()
+///         .await?;
+{{/ReturnsEmpty}}
+{{^ReturnsEmpty}}
+///     let response = client
+///         .{{Codec.Name}}()
+{{> /templates/common/client_method_samples/builder_fields}}
+///         .send()
+///         .await?;
+///     println!("response {:?}", response);
+{{/ReturnsEmpty}}
+///     Ok(())
+/// }
+/// ```
+{{/IsSimple}}

internal/sidekick/rust/templates/common/client_method_samples/parameters.mustache

@@ -0,0 +1,16 @@
+{{!
+Copyright 2025 Google LLC
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    https://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+}}
+///    client: &{{Service.Codec.Name}}