Blog improvements

[shushugah]

• Dynamically load blog posts from techworkersberlin.com/news
• Standardize blog url and manually redirect with netlify.toml (backward compatibility)
• Add DecapCMS for shared editing capabilities without using GitHub directly
• Integrate https://news.techworkerscoalition.org/ somehow?

Visual flow

• The /blog interface could look like Berlin site; where it shows unique authors (or organizational) https://techworkersberlin.com/news
• And each individual blog post could also show author/image/date/title and a backlink to all blog posts on top, like here This PR (in Berlin specific repository) shows what that code might look like Rename articles/news to more consistent "blog" twc-site-berlin#267