feat(routes): add moderation route support

[ashley-evans]

Resolves #23

Firstly, thanks for putting this package together - It's really useful!

I am utilizing the Moderation API as part of some of my projects so I thought I would add support for it here.

I've attempted to follow the same structure / approach as the rest of the routes but please let me know if there is anything else I need to add.

I wasn't quite sure what the builders section was for, so I have just copied another example.

[mharrisb1]

Thanks for contributing. Everything looks great 👍

For builders (or anything under /helpers) it's really just random utils to help with common patterns I found myself repeating over and over so adding anything there is super low priority but always encouraged especially if it will help you out.

The only change I'd request is let's make the model_dict and model_parse utils more flexible and add args/kwargs to the function signature and pass those into the proxied method instead of explicitly marking by_alias as true.

Here's an example that I had in another project where I needed to support Pydantic V1 and V2

https://github.com/mharrisb1/cube-http-client/blob/main/src/cube_http/_utils/serde.py

When you make that quick change I'll merge this in and release everything as v0.10

[mharrisb1]

Just update these function signatures and where you used model_dict in moderations and we're good 👍

[mharrisb1]

I'll fix CI when I'm able to get to my laptop. Should be able to checkout forks and test

[ashley-evans]

I'll fix CI when I'm able to get to my laptop. Should be able to checkout forks and test

Thanks for sorting the CI + reviewing this PR!