Quarkus social support: Create social post image (card) styles

Create style for post image for use on the various social feeds to promote Quarkus.

Unique cards need to be for the following types of promotions.

• Releases
• events
• QTIP video announcements
• QTIP general promotion (call for the community to create QTIPS)
• Extension release promotion
• Call for Extensions (encourage community creation)
• IDC Lab validation study results