feat: [Home page revamp] Feedback batch 2 (20 Mar)

[imtuyethan]

Specs:

https://www.notion.so/jan-ai/Website-Revamped-Jan-Website-04b0f1f8e9ab4e6db2b49890ccb3ee21?pvs=4

Let's make some changes based on

• Feedbacks from Daniel on 20 Mar, 2024: https://www.notion.so/jan-ai/Home-page-feedbacks-20-Mar-327f600ece964e15b05de6501d41cf16?pvs=4
• Full design version of home page (since the Nvidia GTC event is over): replace Twitter & Youtube section with hard-coded ones....

Design:

I included all feedbacks in Figma comment: https://www.figma.com/file/M1ARCQL19Ill0hN2EOR4tI/Jan-Website?type=design&node-id=1863-13032&mode=design