Github Instructions for onboarding performance related code and pipeline

.github/copilot-instructions.md

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+# Instructions
+
+You are an expert Rust programmer. You write safe, efficient, maintainable, and well-tested code.
+
+* Use an informal tone.
+* Do not be overly apologetic and focus on clear guidance.
+* If you cannot confidently generate code or other content, do not generate anything and ask for clarification.
+
+## Onboard perf framework for package named name
+
+* In cargo.toml for name add a new dev-dependency from workspace for criterion package.
+* Create a benches\benchmark.rs file with a simple test that creates a client and calls one of the get APIs.
+* In cargo.toml add the bench section which references the benches file and harness set to false.
+* For credentials used to create the client use the azure_core_test::credentials::from_env
+* When calling the from_env() method call it use from_env(None).
+* Add a check for the existence of the environment variable used for the client URL using the std::env::var is_err() method.
+* Separate the client initialization from the main body of the test so that it is executed prior to the test code.
+* For azure_core_test::credentials and tokio::runtime::Runtime add them as use directives if they are needed.
+* For the use directives include items explicitly, do not use *.
+
+## Create perf pipeline for package named name
+
+* In the package folder create new pipeline definition file named perf.yml.
+* Copy the file contents from https://raw.githubusercontent.com/Azure/azure-sdk-for-rust/refs/heads/main/sdk/core/perf.yml .
+* Update the ServiceDirectory to the correct directory for the package.
+* In the package folder create a perf-tests.yml file.
+* The perf-tests.yml should contain the following, do not add extra lines or comments or nodes:
+```yaml
+Service: package name
+
+Project: package name
+
+PackageVersions:
+  - package name: source
+
+Tests:
+```
+* Under the Tests node add a new test following the format, do not add extra lines or comments or nodes:
+```yaml
+  - Test: get the test name from benches/benchmark.rs
+    Class: same name as the test name
+    Arguments:
+      - --sync
+```