events has columns event_id and timestamp (datetime).
Add the columns year, month, day, weekday and hour, all integers, with
weekday as pandas gives it (Monday 0 through Sunday 6). Return the original
columns plus the five new ones, index unchanged.
Input
event_id timestamp
0 1 2022-03-07 14:30:00
1 2 2021-12-25 00:05:00
Output
event_id timestamp year month day weekday hour
0 1 2022-03-07 14:30:00 2022 3 7 0 14
1 2 2021-12-25 00:05:00 2021 12 25 5 0