Show metadata on connector docs

[evantahler]

This PR loads up the latest metadata entry for connectors and injects useful info at the top of the page:

This is accomplished by adding a remark which adds some custom logic to the markdown processor. We download the latest version of the connector registry at build time and inject a new table at the top of the page showing some handy information:

Pros of this approach:

• No modification of the markdown needed
• No new react components to support in-product

Cons of this approach:

• The registry is downloaded at build-time, and therefore can get stale. We should periodically rebuild the docs site to overcome this.

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Name	Status	Preview	Comments	Updated (UTC)
airbyte-docs	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 10, 2023 10:46pm

[bnchrch]

Great addition. A few nits but I wouldnt stand in the way!

[nataliekwong]

Amazing :)

[timroes]

Want to test something still later. Please hold back merging yet (in case you wake up before I'm getting to test this).

[evantahler]

There's also something wacky with remark that's injecting an <undefined> container around the div which I'm trying to figure out how to remove. I think it's an interaction with the image element.

[timroes]

What's the purpose for waiting here?

[evantahler]

After the latest batch of suggestions:

[evantahler]

I've removed the table and replaced it with a div - I just couldn't get remark to render it without literal whitespaces which the browser complained about

[evantahler]

Ok, I think this is ready now. The comments have been addressed. I've replaced the timer and per-page invocation of fetchCatalog with one invocation at the start of the pligin then every transformer just waits until it is done await Promise.resolve(registryFetcher);.

Thanks for reminding me how real programming language work, @timroes!

[timroes]

@evantahler Why are we generically removing any s at the end of a connector type?

[timroes]

Ah I think I get it, this is only here to make destinations -> destination, sources -> source. I was misreading this as being executed on the actual name of the connector (which we often call the connector type in the rest of the product :D)