Feat updated css for links and updated twitter handles

[vaishnav-mk]

The following changes were made:

• added twitter handles for a few projects
• removed project website for Artificial Intelligence Center of Excellence as the organization link was displayed as the project website
• updated how card links are displayed
  before:
  
  after:
  

Browser requirements (for page updates)

Your updates should work in the following environments:

• Latest 2 versions of Edge
• Internet Explorer 11 (should be useable, not pixel perfect)
• [ x] Latest 2 versions of Firefox (one on Mac OS, one of Windows OS)
• Firefox 68 (or latest version for Red Hat Enterprise Linux distribution)
• Latest 2 versions of Chrome (one on Mac OS, one of Windows OS)
• Latest 2 versions of Safari
• Android mobile device (such as the Galaxy S9)
• Apple mobile device (such as the iPhone X)
• Apple tablet device (such as the iPhone Pro)

Ready-for-merge Checklist

Check off items as they are completed. Feel free to delete items if they are not applicable.

• Expected files: all files in this pull request are related to one request or issue (no stragglers or scope-creep).
• Browser testing passed.
• Repository compiles.

Merging

Please squash when merging and ensure your commit message uses conventional commit formatting.