Update website to announce event, call for speakers/sponsors

[perwyl]

Update website to announce event

• Update terminal section information
• Remove livestream section
• Archive 2022 talks
• Remove Schedule section
• Remove Speakers section
• Remove Sponsors section
• Remove Partners section

{
  "title": "GeekcampSG 2023",
  "date": "2023 October",
  "inPersonLocation": "TBC",
  "onlineLocation": "[Discord](https://www.geekcamp.sg/discord), YouTube",
  "registration": "TBC",
  "cfp": "TBC",
  "volunteer": "TBC",
  "description": "Join us for an eventful day of geek talks."
}