TimestampStrings allows ZoneInfo object as time_zone parameter

So we can use pre-parsed data

Some tests for parsing settings, timestamp output

test-run/timestamp_strings/timestamp_strings.py

@@ -4,10 +4,12 @@
 Test for double byte format
 """
 
+from zoneinfo import ZoneInfo
 from corelibs.string_handling.timestamp_strings import TimestampStrings
 
 
 def main():
+    """test"""
     ts = TimestampStrings()
     print(f"TS: {ts.timestamp_now}")
 
@@ -16,6 +18,11 @@ def main():
     except ValueError as e:
         print(f"Value error: {e}")
 
+    ts = TimestampStrings("Europe/Vienna")
+    print(f"TZ: {ts.time_zone} -> TS: {ts.timestamp_now_tz}")
+    ts = TimestampStrings(ZoneInfo("Europe/Vienna"))
+    print(f"TZ: {ts.time_zone} -> TS: {ts.timestamp_now_tz}")
+
 
 if __name__ == "__main__":
     main()