_redirects file support doc

[TMoMoreau]

Creating the branch and adding the page to config.js. This is for the "Gateway redirects" end-user doc.

Spec: ipfs/specs#290

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[TMoMoreau]

This is a very rough draft of what will be the gateway redirects doc. A lot of this was just pulled directly from the spec here: ipfs/specs#290.

Things that still need to be done:

• Get a quick review for accuracy and relevancy.
• Expand on concepts and uses as needed, pretty bare-bones ATM.
• Polish the doc as a whole, make more end-user friendly.

[BigLep]

2022-09-08 conversation:

1. don't document the old behavior.
2. This can get merged after it lands in Kubo

[lidel]

Thank you @TMoMoreau, I did a quick style pass and left some notes / suggestions on how to make this more friendly to end-users.

[johnnymatthews]

There's a few changes I've suggested here. On top of those, here's some stuff you'll need to change:

1. Don't use formatting (code blocks, italics, bolding, etc) in headers.
2. Use - for bullet points.
3. In examples, make the reader the subject, not the writer. So use you must xyz instead of I need to xyz.
4. Always assign code blocks a syntax. If there isn't a syntax available use ```plaintext.
5. There should only be 1 top-level header (# Header). The title: variable in the front-matter acts as the page's top-level header. You need to increase every header in this article by one #.

[johnnymatthews]

Nice, thanks for adding those changes. This PR is still in draft, so let me know when you need another review.

[TMoMoreau]

At this point just waiting to hear from @lidel about the actual content.

[lidel]

@TMoMoreau i've pushed some changes based on ipfs/kubo#8890 (which got merged and is scheduled to ship next week in Kubo 0.16 RC ipfs/kubo#9237). Added some content and removed some + updated examples to match implementation syntax.

Please fetch my changes and give it a read. Feel free to fix any bad phrasing / bugs you see, but other than that, the scope of content should be good enough from my end :)

[TMoMoreau]

Thanks @lidel! I'll go over it all and make small adjustments to format/style. If it's not done today, I'll work on it over the weekend to get ready for merge on Monday.

[lidel]

@TMoMoreau no rush, this can wait till Monday – the release will be Release Candidate, so its ok to have another week or so before we tag a final one :)

[johnnymatthews]

This looks good! Let's merge when the next release goes out.

[TMoMoreau]

Removed [[toc]] from this as we don't use it anywhere else and the sidebar menu has a similar feature already.

[filecorgi]

• Image optimization came back clean!
• Vuepress build was successful!

[lidel]

We've shipped 0.16.0-rc1, I'm merging this so we can refer to it in Release Notes :)

Thank you @TMoMoreau for making sure these docs are ready ❤️