[DEMO] Glossary is missing 'Repository'

[pushpam2404]

This is a demonstration issue. It is deliberately tiny, so it can be
done start to finish in a couple of minutes. If you are brand new, these are
the ones to start with.

Context

The glossary defines fourteen terms but not the most basic one of all. Somebody reading it for the first time meets "repository" in almost every other entry without it ever being explained.

What to change

Files: data/glossary.json

Requirements:

• Add one object for Repository
• short is a single sentence, written for somebody who has never used Git
• full can mention that people shorten it to "repo"
• Add a seeAlso array pointing at terms already in the file, such as Fork or Clone
• Position in the file does not matter — the page sorts them itself

Acceptance criteria

• The term appears on the glossary page
• Searching "repo" finds it
• python3 -c "import json; json.load(open('data/glossary.json'))" runs clean
• No existing entry was changed

How to verify locally

python3 -c "import json; json.load(open('data/glossary.json'))"
python3 -m http.server 8000   # then open glossary.html

How long this takes

Three minutes. One small block of JSON. Watch the commas.

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