Update Website with new default colors and remove old term design

[raphamorim]

New colors:

background = '#0F0D0E'
black = '#231F20'
blue = '#006EE6'
cursor = '#F38BA3'
cyan = '#88DAF2'
foreground = '#F9F4DA'
green = '#0BA95B'
magenta = '#7B5EA7'
red = '#ED203D'

[Krishhhnaa]

@raphamorim please assign this issue to me if not solved

[raphamorim]

Hey @Krishhhnaa I have updated few days ago with the new colors.

But there's two things can be done:

1. Fix the image preview for when you share the link to use the banner https://github.com/raphamorim/rio/blob/main/docs/banner.png

2. Would be nice to overwrite twitter default colors for embedded tweets (not sure if there's a nice way to do with iframe) Maybe we can have our own twitter component (without include stars or replies)

Let me know if you want to jump into any of those.

[raphamorim]

Will close this issue for now since the colors were updated, but I can create issues to those 2 points.

[Krishhhnaa]

Thanks man ! i am a beginner to Open Source , i am finding small small issues right now. I will try to solve #27 issue.