Newspost on software spotlights

Added Newspost on newly published Helmholtz Software Spotlights presentation page.

• 👉 Review here👈
• 👉 Edit here

Note:

• With this newspost, the link is imo set on the front page for the time being.
• A more sustainable solution for conveniently linking such infos on the front page is needed, and will be tackled by the re-design of the front page that is currently under discussion.

Closes #174 (closed)