Leverage REM API to generate the cards on our Eclipse WG page and details about our Members

The page in questions are:

• https://www.eclipse.org/membership/exploreMembership.php
• https://www.eclipse.org/org/workinggroups/explore.php
• https://www.eclipse.org/membership/showMember.php?member_id=937

We now need to keep this API up-to-date for REM + We need to keep our Explore our Working Groups up-to-date. It's time-consuming + error-prone to duplicate that work.

Let's work on avoiding that. We should only need to update that information in REM API: https://membership.eclipse.org/api/working_groups

Let's fetch the content from that API to generate our Explore our Working Groups page. We need to do the same for when we list members on our site.

Any concerns?