Add source mocked data file, make current_pto tool functional, rename future_pto to future_pto_calc

tools/future_pto_calc.py

@@ -0,0 +1,17 @@
+def future_pto_calc(args: dict) -> dict:
+    
+    start_date = args.get("start_date")
+    end_date = args.get("end_date")
+
+    # get rate of accrual - need email?
+    # get total hrs of PTO available as of start date (accrual * time between today and start date)
+        # take into account other booked PTO??
+    # calculate number of business hours of PTO: between start date and end date
+
+    # enough_pto = total PTO as of start date - num biz hours of PTO > 0
+    # pto_hrs_remaining_after = total PTO as of start date - num biz hours of PTO
+
+    return {
+        "enough_pto": True, 
+        "pto_hrs_remaining_after": 410,
+    }