Create the last three sections of the landing page

[ycong1129]

Add details to the landing page, roughly matching the Figma design. The text for the page hasn't been settled by the Game Dev committee so placeholder text will be fine.

Make sure to break the features into components where sensible so the committee can rearrange and modify it to suit their needs.

[github-actions]

Branch issue-33-Create_the_last_three_sections_of_the_landing_page created!