Export astronomical events list to Google Calendar

[AlexanderKrutov]

Nice idea to allow export list of astronomical phenomena to CSV file suitable for import into Google Calendar.
More about format here: https://support.google.com/calendar/answer/37118?hl=en&co=GENIE.Platform%3DDesktop

Think about .ics format too, here is an example of the iCalendar file:

BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Astrarium/Astrarium 23.9//EN
X-WR-CALNAME:Astronomical events
X-WR-TIMEZONE:UTC
X-WR-CALDESC:Shows astronomical phenomena
BEGIN:VEVENT
DTSTAMP:20230929T120000Z
DTSTART:20230930T145312Z
DTEND:20230930T145312Z
UID:e23c35cc-75c6-4a71-bc66-14d4d32cf756
DESCRIPTION:Venus passes 2 degrees North of Mars
SUMMARY:Venus passes 2 degrees North of Mars
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20230926T112916Z
DTSTART:20230930
DTEND:20231001
UID:a621e2b3-1943-42f4-b0cf-f7984a067714
CREATED:20230929T120000Z
DESCRIPTION:Maximum of activity of meteor shower Southern Taurids
SUMMARY:Maximum of activity of meteor shower Southern Taurids
END:VEVENT
END:VCALENDAR

CSV format for Google Calendar:

"Subject","Start Date","Start Time","End Date","End Time","All Day Event","Description"
"Moon (Φ=0.92) passes 3.2° South to Saturn (+0.52ᵐ)","09/27/2023","05:24 AM","","",False,"Moon (Φ=0.92) passes 3.2° South to Saturn (+0.52ᵐ)"
"Maximum of activity of meteor shower Southern Taurids","09/27/2023","","","",True,"Maximum of activity of meteor shower Southern Taurids"