GH 3365 Add contributors page on twenty-website

[i-am-chitti]

Description

This PR adds contributor listing page and single contributor page.
Design - https://www.figma.com/file/aNpCjwN9wg2DqLWAHPS0ll/%F0%9F%8C%8D-Twenty---Website?node-id=5%3A4973&mode=dev

Issues

• Closes New Contributors Page for Twenty Website #3365

Screenshots

Screencast

https://drive.google.com/file/d/1lMrIPK4WmckMuImjOsgBGBVJasqdoiVO/view?usp=drive_link

Note/Technical Choices

1. The header for contributors page is different from what's globally available. To make them same, we would require to remove this custom heaader check - https://github.com/twentyhq/twenty/blob/main/packages/twenty-website/src/app/components/HeaderDesktop.tsx#L155 and https://github.com/twentyhq/twenty/blob/main/packages/twenty-website/src/app/components/HeaderDesktop.tsx#L106 . I've made them same as was referred in design.
2. On mobile device, I'm trying to set icon dimension but the styles doesn't apply - code here. Not sure how we can handle this. Due to this there will be difference in icon sizes.
3. Instead of displaying all PRs on single contributor page, I'm limiting them to 10.
4. The calendar in ActivityLog component being used is not currently responsive in case there are lots of activity. I've tried several times to make it responsive across all devices like desktop, mobile and tab. But, it's lacking the feature. Also, there is no way we can remove the weekdays appearing on left side. There is a prop name weekdayLegendOffset but it's not reliable as we'll be stripping the activity parts and there are some pages where a small part of text is still visible.

[FelixMalfait]

Great! Thanks a lot!