Upgrade to vanilla

[r0mflip]

• [X] Use vanilla language (@r0mflip & @notlmn)
• [X] Make performant (@r0mflip)
• [X] Add lighthouse tests (@r0mflip)
• [X] New design (@notlmn)

[r0mflip]

@RohithSrk IMHO, our own blog can come later. @notlmn mostly events are done, please do check.