[Markdown] [Glossary] Convert Glossary to markdown - DO NOT SQUASH MERGE

[wbamberg]

This PR converts the Glossary (https://developer.mozilla.org/en-US/docs/Glossary) to Markdown.

The preparation PR for this: #9361.

The conversion report:

# Report from 9/30/2021, 11:38:32 AM
## All unhandled elements
- sub (8)
- section#Quick_links (1)
## Details per Document
### [/en-US/docs/Glossary/Bézier_curve](https://developer.mozilla.org/en-US/docs/Glossary/Bézier_curve)
### Missing conversion rules
- sub (13:173)
- sub (13:188)
- sub (13:203)
- sub (13:222)
- sub (15:64)
- sub (15:81)
- sub (15:114)
- sub (15:131)
### [/en-US/docs/Glossary](https://developer.mozilla.org/en-US/docs/Glossary)
### Missing conversion rules
- section#Quick_links (28:1)

(unconverted elements were discussed in #9361).

[wbamberg]

To coordinate reviews I've created https://docs.google.com/spreadsheets/d/1wefKa0rTmHLZAg0GVZ69aNQL_h5eatUYBX0DmeE9MqE/edit?usp=sharing

As before, the purpose of this is just to ensure different people review different pages.

[hamishwillee]

@wbamberg Why has the double space reappeared in bullets? I saw this in Ruth's PR too.

[wbamberg]

I don't know about Ruth's PR, but in my case I was using the wrong branch of the converter, so Prettier formatting wasn't being applied :(. I can force-push an update.

This also means I need to Prettify the SVG and HTML docs, which will be fun.

[wbamberg]

Should be fixed now.

[hamishwillee]

Yes it is. Much better.

Good luck with prettifying the SVG and HTML docs. Can you apply to MDN too (if that has already gone in)?

[wbamberg]

Here's a draft PR: https://github.com/mdn/content/pull/9395/files - I am too tired to look at it properly, but it's not as bad as I had feared.

Interesting thing is you can also ask Prettier to format quoted code blocks - I have switched it off here (and h2m has it switched off too) but I think it would be great to have consistently formatted code samples!

[hamishwillee]

@wbamberg I would have approved it - easy to review. I like consistent code samples too - by quoted, do you mean using the backticks? If so, yes, we should always do that.

[hamishwillee]

That's much nicer, at least in this case. I worry about other cases.

[hamishwillee]

Not a conversion issue, but this is odd.

[hamishwillee]

@wbamberg I might do a proper review later, but for now looks great except for the double spaces on bullets.

We could fix up the remaining quick_links divs too, if only because the converter will then do the work for us of bulletizing that.

[wbamberg]

Since this has rotted I've closed it and opened a new one at #9630.