docs: add Glossary page (#18187)

* docs: add Glossary page

* Update docs/src/use/core-concepts/glossary.md

Co-authored-by: Tanuj Kanti <86398394+Tanujkanti4441@users.noreply.github.com>

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Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>
Co-authored-by: Tanuj Kanti <86398394+Tanujkanti4441@users.noreply.github.com>

* A large set of touchups

* One small typo fix

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Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>

* Two more (new)s

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Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>

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Co-authored-by: Tanuj Kanti <86398394+Tanujkanti4441@users.noreply.github.com>
Co-authored-by: Nicholas C. Zakas <nicholas@humanwhocodes.com>
Co-authored-by: Milos Djermanovic <milos.djermanovic@gmail.com>