feat: add week number event

[Cwjiee]

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Name: Pull request
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Title: "Add Week Number Event"
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Assignees: cwjiee

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[sycanz]

1. This line should be +5 as now the event only goes till Thursday
2. Here - Instead treating each week as a separate event and sending 14 request, treat the weekly event as one single event that repeats for 14 times

3. Let user choose if they want to have the weekly events imported into their calendar