Make Transform2D/3D, Basis, and Quaternion docs more consistent

[Mickeon]

Fixes #90727

This PR aims to be the glue that holds the following together:

• Overhaul Transform2D documentation #94127
• Overhaul Transform3D documentation #87334
• Overhaul Basis' documentation #87175
• Overhaul Quaternion documentation #87181

It's an assortment of general tweaks and fixes for consistency between all 4 class reference pages, based off of prior reviews.

For people reading this, you may use this opportunity to point out oddities between all 4 so that they can be polished together.

[Mickeon]

I updated the PR with the above feedback, plus a few other minor tweaks to iron it out. This includes removing periods from # Prints comments. Almost all the time they're not present in these kinds of comments to only tell what is exactly printed to the console.

[aaronfranke]

Looks good to me.

[tetrapod00]

For general clarity, within the changes already made. I didn't read through all four classes to find potential new changes.

[kleonc]

No more nitpicks. 🎉

[Mickeon]

Nitpicks are what my neurodivergent perfectionism thrives for

[akien-mga]

Thanks!