Include embed titles in all tags (#2419)

* Add title and remove heading

+ also changed any mentioning of `!tags` command

* Fixed yaml scan errors

+ using tabs instead of spaces

+ enclosed title in `comparison.md` with quotes

* Implement ChrisLovering reviews

+ changed all "Name1 vs. Name2" to "Name1 vs. name2"

+ changed "python discord" to "Python Discord" in titles

+ fix typos

+ reverting hunk for `dotenv.md`

+ changed all title cases to sentence cases

* fix grammar

+ changed "embed" to "embeds"

* remove other ot channels mentioned except ot2

* Fix mistakenly removing a blank line

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