chore: cleanup

[CodeWithEmad]

I was just reading the docs and noticed a typo. went to fix that, and found another one and another one. After a couple of hours, I found myself cleaning up most of the documentation 🤣
I know reviewing might be painful, but look at the bright side, we will have much much cleaner documentation in the future.

This will introduce:

• followed the heading symbols for most of the docs (I might missed some. There was a lot!)
• fixing the deprecation/removal of titles for quince

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[CodeWithEmad]

Also, the graphviz config on maintainers_home.html -> High Level Contribution Process has some issues and didn't render anything for me (maybe something is missing on my local?)

[pdpinch]

I'm willing to review this, but the build failed.

[CodeWithEmad]

Thanks @pdpinch
My bad. I fixed the issue and built it on my local.

[sarina]

Yikes! I'm gonna let @pdpinch review this, but I'll jump in if needed.

@CodeWithEmad - for future cleanups, it'd be preferable if you could split into smaller pull requests and/or commits. It may take a long time to review this, and require some painful rebasing.

[CodeWithEmad]

For sure @sarina.
I got a little too excited with my typo hunting. I'll make sure to tone it down next time!

[sarina]

Definitely don't turn it down, I love the changes! I really appreciate you making them.

Ways you can consider splitting it up would be do only a group of files at a time (ie only the release notes files, then only the course ops ones, etc), or splitting out different types of changes (ie one PR that only does trailing whitespace, another PR that is just fixing header definitions, etc).

[pdpinch]

Indeed, I haven't gotten very far with this yet. If you have some time to break it into smaller, section-based PRs, that would be motivating and help us get it merged faster.

[CodeWithEmad]

Sure, I'll try to break it into smaller commits.

[CodeWithEmad]

I'll move other changes to different PRs.

[pdpinch]

@CodeWithEmad does this PR need to be reviewed, or was it replaced by #481 and #482 ?

[CodeWithEmad]

Yes, it can use a review, @pdpinch.
This one contains fixes for header definition and some misplaced URLs.

[CodeWithEmad]

I resolved the conflicts. Could someone please look this over?
@feanil
@pdpinch

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