chore: add Claude Code configuration and documentation

- Add /organize-commits slash command for logical commit organization
- Add AGENTS.md with repository guidelines and workflows

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

.claude/settings.local.json

@@ -0,0 +1,10 @@
+{
+  "permissions": {
+    "allow": [
+      "Bash(git add:*)",
+      "Bash(git commit:*)"
+    ],
+    "deny": [],
+    "ask": []
+  }
+}