feat(generator): support custom default casing for client properties

[lxxonx]

Change Summary

model UserProfile {
  ...
}

this code generate prisma class attributes like prisma.userprofile, which is sometimes very hard to read i suggest having default attribute name as prisma.user_profile with using jinja2_strcase package.

Checklist

• [x] Unit tests for the changes exist
• [x] Tests pass without significant drop in coverage
• [ ] Documentation reflects changes where applicable
• [x] Test snapshots have been updated if applicable

Agreement

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[RobertCraigie]

Thanks! Unfortunately, this is a breaking change so I'd like to first introduce this using a config option, e.g.

generator client {
  provider = "prisma-client-py"
  client_casing = "snake_case"
}

I'm also a little hesitant to introduce this new dependency, would it be feasible to do this without that? or at least using a popular package for changing case?

It's also worth noting that longer term, I want to support customising this more freely, e.g. (structure still TBD)

/// @Python(instance_name: 'user_foo')
model UserFoo {
  // ...
}

[RobertCraigie]

FYI I cherry picked your change case util functions into a separate PR as I needed them for something else, #918.

I tried to rebase your PR for you to resolve the merge conflicts but it looks like I don't have permission to push to your fork, could you open a separate PR with edit perms and from a different branch? (i.e. a branch that isn't main on your fork)

[lxxonx]

New PR has opened with edit permission https://github.com/RobertCraigie/prisma-client-py/pull/922 Please check it out and let me know if you need anything for help :)