Trending articles should come all from single source

Right now the trending articles are from different sources

• for /learn, trending.json file in https://github.com/freeCodeCamp/freeCodeCamp/tree/main/client/i18n/locales
• for /news, https://github.com/freeCodeCamp/cdn/tree/main/build/universal/trending
• for forum, https://github.com/freeCodeCamp/forum-theme/blob/main/settings.yml

We need to have all footers take the articles from the same source (cdn), and also, create a way to visually test the footer to confirm the cdn file is fine before it goes live.

cc/ @ahmadabdolsaheb @zairahira

[ahmadabdolsaheb]

Had a discussion with a few of the dev team and here is the conclusion:

1. The CDN will be the single source of truth.
2. New prs to the trending links for each language will check if the new links have the required number of texts, links, and max chars for the links of each column.
3. Learn will pull from CDN on build
4. News pulls from CDN on build
5. Once CDN pr to the English trending articles is merged, a github action will create a pull request on the forum theme repo which will be reviewed and merged manually.

Since different characters in difference languages have different widths a visual test is also required. Here are a few ways to approach it:

1. pass the proposed links to local news build and view the footer grid locally.
2. a footer previewer tool that receives a pr and displays proposed changes.

[scissorsneedfoodtoo]

@ahmadabdolsaheb, thanks for reminding me about this. I’ll take a look at that PR now.