add schedule

[lyqht]

Figma link: https://www.figma.com/file/f2SBsTMRRJfZut5dOZFyNs/Website-UI?type=design&node-id=342-12&mode=design&t=aOBlTwKxuhLYmETs-4

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Note that compared to the design, i added the actual date + link to pre-event registration as well

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[lyqht]

@qin-guan after roger's feedback, we modify some text & added link to eventbrite (the blue arrow)