[news] Reorganise our news and article infrastructure

[mmcky]

Currently we have:

blog.quantecon.org that is unmaintained and stale.

and some news on https://quantecon.org/news/ that is hard to edit and fairly basic in terms of writing useful articles on say software releases (i.e. pandas 2.0).

@mmcky to:

• review platforms that can better support a news.quantecon.org or info.quantecon.org that would be a mixture of articles, news and quantecon announcements.
• we could have news, article tags etc.
• I would like it to be harmonised with our lecture syntax using myst

Once a solution is identified then we would need to

• commit to maintain and organise guest posts (Proposed Coordinator: @mmcky)