docs: example usage with flask, django, and instructor, and tool calls

[brenkao]

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (da3a230) to head (7d274e7).
Report is 6 commits behind head on dev.

❗ Current head 7d274e7 differs from pull request most recent head e14dae5

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Additional details and impacted files

@@            Coverage Diff            @@
##               dev      #328   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files          133       138    +5     
  Lines         7563      7528   -35     
=========================================
- Hits          7563      7528   -35     

Flag	Coverage Δ
tests	100.00% <ø> (ø)

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