Add a news feed to the front page

[Daktyl198]

Description

I propose adding a blog-style news feed to the front page, preferably with the ability to pin posts.

Context

Allowing groups to post news directly via MangAdventure would allow them to use the CMS as their main site, rather than relying on a separate and overly complex piece of software like WordPress just to put out group-related announcements and news.

Possible Implementation

I'd recommend keeping the feature as simple as possible. Markdown compatibility would allow for at least basic styling of articles, but beyond that not much is necessary. I'd recommend turning the front page into a two-column setup on desktops, with the news feed as a 1/3 content-width block on the left and the chapter updates a 2/3 block on the right. On mobile, display any pinned news articles first, along with a "more news" button to display more articles, followed by the latest releases list.

[ObserverOfTime]

I think that Discord & Twitter are better platforms for announcements.
However, we already have info pages with Django Flatpages + TinyMCE.
We can do something similar for announcements.
That said, we need to finish 3 things first:

• Comments, so users can comment on the articles. ([TODO] Comments #15)
• RSS, so users can be notified via an RSS reader. (Implement syndication feeds #20)
• Redesign, so we can make space for the news feed. ([TODO] Revamp front-end #22)