For convert time string, skip convert if incoming value is a number of any type

Any float number will be rounded, and everything that is any kind of number will be then converted to int and returned
The rest will be converted to string and normal convert is run

test-run/string_handling/timestamp_strings.py

@@ -31,6 +31,13 @@ def main() -> None:
         "30m 45 minutes",  # minutes appears twice
         "1Y 2 years",      # years appears twice
         "1x 2 yrs",        # invalid names
+
+        123,               # int
+        789.12,            # float
+        456.56,            # float, high
+        "4566",            # int as string
+        "5551.12",         # float as string
+        "5551.56",         # float, high as string
     ]
 
     for time_string in test_cases: