feat: add ai agent support setup

Author: matthiaszimmermann

.cursorrules

@@ -0,0 +1,16 @@
+# Cursor AI Configuration
+
+👉 **See [.github/copilot-instructions.md](.github/copilot-instructions.md) for complete AI context and coding conventions.**
+
+This file redirects to the canonical AI instructions to maintain a single source of truth.
+
+## Quick Reference
+
+The main instructions file includes:
+- **Naming conventions**: Python (snake_case), Queries ($content_type), Events (camelCase)
+- **API return values**: create_entity() returns tuple, update/delete return receipt
+- **Common mistakes**: Wrong entity attributes, incorrect unpacking, query syntax errors
+- **Running examples**: Use `uv run python -m arkiv_starter.XX`
+- **Testing patterns**: Fixtures, local node limitations, parallel execution
+
+When working with this codebase, always refer to the main instructions file for the most current conventions and patterns.