Adding index + query examples for Julia documentation, and some evals.

[codetalker7]

^ what the title says. Plus a minor change to the config, wherein we can directly add a vector of strings to the config as the collection.

[codecov]

Codecov Report

Attention: Patch coverage is 20.00000% with 4 lines in your changes missing coverage. Please review.

Project coverage is 58.51%. Comparing base (09b0ef5) to head (e70cbb3).
Report is 7 commits behind head on main.

Files with missing lines	Patch %	Lines
src/indexing.jl	0.00%	3 Missing ⚠️
src/loaders.jl	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #35      +/-   ##
==========================================
- Coverage   58.70%   58.51%   -0.20%     
==========================================
  Files          16       16              
  Lines         695      699       +4     
==========================================
+ Hits          408      409       +1     
- Misses        287      290       +3     

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