refactor: cleaner $.expr + match order with spec

[Duologic]

First of all, great job on this tree-sitter parser. This is the first time I'm working with tree-sitter, so please be kind.

I'm debugging a few issues but had a hard time navigating the code so I spent a bit of time refactoring first.

This PR does 3 things:

• Format the JS with prettier
• Split out the $.expr into separate items (and matched order with the Jsonnet spec, there were a few differences)
• Matched order of other items with the Jsonnet spec

I've maintained the visibility by using the underscore prefix on all new items but we might want to make them visible in the output (and perhaps hide $.expr as it's ubiquitous) in a follow up PR.

[Duologic]

ping @tjdevries @aryx Any feedback on this?

[aryx]

Would be good to have some CI checks on this repo so at least we're making sure it does not break the build.

[Duologic]

Fair point, I have run the test cases locally tho. I have several changes on my fork that I'd like to pass along to this repo, I'll have a look at adding CI before those.

[aryx]

maybe @tjdevries should give some 'maintain' right to one of us, otherwise we will have to fork the repo to get improvements in it.

[aryx]

I've created https://github.com/sourcegraph/tree-sitter-jsonnet/issues/17

[Duologic]

@tjdevries Any feedback on this? (last ping, no worries if you are too busy, we can fork and converge later)

[tjdevries]

Hey, thanks for the ping! I will follow up to see about adding other maintainers (may have to move it out of sourcegraph org, not sure).

in the meantime, PR looks good to me. I'll merge. Thanks!