Unify casing

[Twixes]

Proposal

Currently original parts of the code use snake_case, while newer additions use pascalCase. It's JS convention though to use pascalCase in most cases and it might be a good idea to refactor at least exported things (that users see) with that convention in mind.

Upsides

The current mix doesn't look very professional and might be leaving a poor impression on developers wanting to use PostHog.

Downsides

This maneuver would leave quite a lot of these snake_case parts and nuking them is not really an option at this point, so they'd have to be left functioning, just deprecated – that wouldn't be good for code readability.

[mariusandra]

Yeah, this is definitely something to do one day! We should have a good test suite before embarking on this journey though.

[posthog-bot]

This issue hasn't seen activity in two years! If you want to keep it open, post a comment or remove the stale label – otherwise this will be closed in two weeks.

[Twixes]

This is still painfully relevant.