chore: import upstream snapshot with attribution

python/packages/github_copilot/AGENTS.md

@@ -0,0 +1,26 @@
+# GitHub Copilot Package (agent-framework-github-copilot)
+
+Integration with GitHub Copilot extensions.
+
+## Main Classes
+
+- **`GitHubCopilotAgent`** - Agent for GitHub Copilot extensions
+- **`GitHubCopilotOptions`** - Options for Copilot agent configuration
+- **`GitHubCopilotSettings`** - Pydantic settings for configuration
+
+## Usage
+
+```python
+from agent_framework.github import GitHubCopilotAgent
+
+agent = GitHubCopilotAgent(...)
+response = await agent.run("Hello")
+```
+
+## Import Path
+
+```python
+from agent_framework.github import GitHubCopilotAgent
+# or directly:
+from agent_framework_github_copilot import GitHubCopilotAgent
+```