Move HR-related tools to their own folder, add print statement for BookPTO functionality, and add SILLY_MODE

tools/hr/book_pto.py

@@ -0,0 +1,11 @@
+def book_pto(args: dict) -> dict:
+    
+    email = args.get("email")
+    start_date = args.get("start_date")
+    end_date = args.get("end_date")
+
+    print(f"[BookPTO] Totally would send an email confirmation of PTO from {start_date} to {end_date} to {email} here!")
+
+    return {
+        "status": "success"
+    }