Add: 13.0 release announcement

[michicc]

Preview: https://release-13-0.openttd-website.pages.dev

Reddit / Discord / tt-forums:

Breaking news: OpenTTD 13.0 is finally available! Depending on your perspective, we’re either two months early for our usual April 1st release, or a bit tardy for the Christmas 2022 release we intended.

This version brings numerous additions to the game, both on the UI side and on the gameplay side.
Highlights include fractional interface scaling, NewGRF engine variants, multi-track level crossings and various UI improvements.

For the full story, see the release announcement: https://www.openttd.org/news/2023/02/05/openttd-13-0.html

For twitter:

Breaking news: OpenTTD 13.0 now available on Steam / GOG / our website.
Get all the new features now!
https://www.openttd.org/news/2023/02/05/openttd-13-0.html

[michicc]

Steam image suggestion:

News #10 - 13.0 release.xcf.zip