Merge pull request modelcontextprotocol#981 from modelcontextprotocol/add-codeowners-file

Add CODEOWNERS file for repository governance

Author: ihrpr

.github/CODEOWNERS

@@ -0,0 +1,9 @@
+# CODEOWNERS file for MCP Specification repository
+
+# Global ownership - @core-maintainer team owns docs/specification and schema/ directories
+/docs/specification/ @modelcontextprotocol/core-maintainers
+/schema/ @modelcontextprotocol/core-maintainers
+
+# Authorization-related files - @auth team should be notified
+/docs/specification/**/authorization.mdx @modelcontextprotocol/core-maintainers @modelcontextprotocol/auth
+/docs/specification/**/security_best_practices.mdx @modelcontextprotocol/core-maintainers @modelcontextprotocol/auth