[docs] Expand use cases, move them up for discoverability

[SeanNaren]

What does this PR do?

Closes #8693

The goal is to improve discoverability when using the docs of different cases. We've grouped quite a bit into the drop down which hides and obfuscates imo important information.

To improve this, I suggest we go from this:

to this:

Negatives are that dropdown options below common use cases require scrolling, however I think this is fine given the priority of showing features that we support out the box on the left.

Hopefully this sparks discussion!

Does your PR introduce any breaking changes? If yes, please list them.

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[codecov]

Codecov Report

Merging #8692 (4bb860b) into master (08ac079) will decrease coverage by 4%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master   #8692    +/-   ##
=======================================
- Coverage      93%     89%    -4%     
=======================================
  Files         167     167            
  Lines       14037   14037            
=======================================
- Hits        13008   12453   -555     
- Misses       1029    1584   +555     

[tchaton]

LGTM !

[Borda]

very nice!