chore: add GitHub templates

.github/copilot-instructions.md

@@ -1,3 +1,11 @@
+# PR Review Instructions
+
+Provide a concise summary of the pull request and highlight any risks or follow-up work. When tests are mentioned, state whether they passed or failed. Organize the output using the following sections:
+
+- Summary
+- Testing
+- Review Notes
+- 
 # Reviewer Guidance for GitHub Copilot
 
 - Ensure pull request titles and commit messages follow `type: Description` using a verb and an object (e.g., `fix: handle null node`).

.github/labeler.yml

@@ -1,6 +1,23 @@
+# Labeler configuration for automatic issue labeling
+# Labels issues based on keywords found in titles or bodies.
+
 bug:
-  - '(?i)\bbug\b'
-feature:
-  - '(?i)\bfeature\b'
-question:
-  - '(?i)\bquestion\b'
+  - bug
+  - error
+  - exception
+  - failure
+
+enhancement:
+  - feature
+  - enhancement
+  - improvement
+
+documentation:
+  - docs
+  - documentation
+  - readme
+
+ci:
+  - build
+  - workflow
+  - ci

.github/pull_request_template.md

@@ -0,0 +1,8 @@
+## Summary
+<!-- Describe the changes introduced by this pull request. -->
+
+## Testing
+<!-- Describe how the changes were tested. -->
+
+## Issues
+<!-- Link any related issues. -->