Bug 571227 - [February 2021] Newsletter Coding Support

- Add 3 articles and committer profile
- Update images in a2 and news home
- Add community updates
- Add 2021 Jan newsletter to archive
- Add Mailchimp and newsletter title
- Update edge of things register link of the image

Signed-off-by: Yi Liu <yi.liu@eclipse-foundation.org>
Change-Id: I09793b78461d95aacd4fff1bef2139c436fbb993
29 files changed