Implement landing page

[jadjoubran]

• [x] Implement landing page
• [x] Refactor into web components
• [x] Implement grid & responsiveness
• [x] Design review
• [x] syntax highlighting
• [x] Add screenshot to readme.md
• [x] Finalize links
• [x] setup video
• [x] Replace placeholder images with real screenshots
• [x] Test with Lighthouse
• [x] Deploy using netlify
• [x] Test with Lighthouse (hosted version)
• [x] Add favicon
• [x] Fix copywriting
• [x] Test responsiveness
• [x] test on mobile
• [x] Setup domain
• [x] force SSL
• [x] redirect www/non-www
• [x] Add sharing meta tags
• [x] Setup webmaster tools
• [x] Setup Google Analytics
• [x] Design review with @nicolesaidy
• [x] Finalize Mobile version
• [x] Test on extra small mobile devices
• [x] make poster the first frame of the video (vlc)
• [x] review with @nicolesaidy on iOS & Android
• [x] test with beta testers
• [x] Set URL on main repository
• [x] Fix header on mobile
• [x] Finalize copywriting with @nicolesaidy
• [x] Deploy final version
• [x] Use new description of plugins in readme.md