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

[wbamberg]

Previously filed as #9384 which rotted.

The preparation PR for this: #9361.

The conversion report:

# Report from 10/6/2021, 11:14:50 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]

Odd floating tag here

[hamishwillee]

Rendering of *User Interface *(UI) is broken

[hamishwillee]

@wbamberg I looked at a huge number of these (marked up some in the tracking, but looked at many more). There are a couple of minor things but overall IMO this is good to go.

[wbamberg]

@wbamberg I looked at a huge number of these (marked up some in the tracking, but looked at many more). There are a couple of minor things but overall IMO this is good to go.

Thanks so much for looking Hamish! I pushed fixes for the issues you found.

[hamishwillee]

Good to go

[verhovsky]

What about mdn/translated-content?

[teoli2003]

I'm cc/ing @SphinxKnight, he will be able to answer your question (what is the process to get MD in mdn/translated-content.

[SphinxKnight]

Thanks @teoli2003 :) Hello @verhovsky, for mdn/translated-content, it's up to locales' maintainers to migrate the content. I've highlighted the process in https://github.com/mdn/translated-content/discussions/2474 let me know there if you have any question.