Add an RSS feed for blog posts

[cosenal]

At UnitaryCON, @1ucian0 reminded me of my past as a developer of an open-source rss reader, so I felt a moral obligation to add an RSS feed to the Unitary Fund blog.

Partially solves #49. Inspired by this one, we can create an easy follow-up PRs for other pages (e.g. grants.)

Implemented following https://docs.astro.build/en/guides/rss/

Tested with NetNewsWire:

• run the app with pnpm dev
• add localhost:3000 as a «New Feed» on NetNewsWire

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[nathanshammah]

@cosenal thanks for adding this. I wonder if we can address it also for grants (see #49), in the future. That said, how do you subscribe / find out if you are a visitor? There is an RSS icon showing in the browser? I cannot inspect the page, as tests, are failing, not sure why, see #547.

[cosenal]

I wonder if we can address it also for grants (see #49), in the future.

I mention that in the PR description :)

how do you subscribe / find out if you are a visitor? There is an RSS icon showing in the browser?

This feature has mostly been removed from modern browsers. Unfortunately RSS/atom feeds are not as fashionable as they used to be 10 years ago. In modern browsers, you can still check if a page has an RSS feed manually or by using some browser extensions (I use RSSPreview). The case of this PR is that if an user assumes our blog has a feed and tries to link it to their reader, it will work and they will not be disappointed. An alternative would be an explicit «Subscribe» button that leads to the RSS feed, but that is something out of fashion these days.

[nathanshammah]

Thanks @cosenal! I missed the comment on the grant feed, +1 from me to open a new PR for that too.

Regarding including the link: if we don't, I feel it would be very hidden. Not sure how RSS is used these days, but what about having a simple link under a text, in the main file, https://github.com/unitaryfund/unitary.fund/blob/blog-rss/src/pages/blog.mdx,
of the kind of:
"Stay up to date with new blog posts by joining the [UF Discord server], subscribing to our quarterly [newsletter] or subscribing to the [RSS feed]". In any case feel free to merge.

[cosenal]

@nathanshammah Thanks for the review! I merged it so we can also test it on the live website. I will create a followup PR with the text you suggested and an alternate feed for grants.

[natestemen]

Ha! good eye

[1ucian0]

It looks beautiful in Feeder. Thanks.

[cosenal]

Nice, @1ucian0!
RSS is not dead! ✊

[amirebrahimi]

Certainly not! I still use: https://ifttt.com/feed