Add a `--pretty-headings` flag to the CLI

[jacanchaplais]

Summary

Add a flag to prettify headings generated from parameter names in Tesseract input / output schemas. Headings will take the parameter name, replace underscores with spaces, and capitalise them to be consistent with the rest of the UI.

Will be in the CLI as --pretty-headings/--no-pretty-headings, where the default is --pretty-headings.

Why is this needed?

Currently this is implemented as a default. But this causes a problem when two or more parameter names diverge only in their case, eg. wizard and Wizard (real example here). Providing CLI users the option to switch off the text processing circumvents this issue.

Usage example

Parameter names show up as headings verbatim as they are in code:

tesseract-streamlit --no-pretty-headings "http://localhost:4567" app.py

Parameter names are prettified as headings:

tesseract-streamlit --pretty-headings "http://localhost:4567" app.py

or just

tesseract-streamlit "http://localhost:4567" app.py

[jacanchaplais]

Turns out that the capitalisation and replacement of underscores to spaces occurs in the OAS generation. The original parameter names are in the OAS schema, too. I'll prototype switching out the parameter names for the OAS generated titles.