refactor: make parser tests integration tests

[psteinroe]

let me know if you want this. I think the separation will be beneficial when I add the regression test suite back.

ref: https://doc.rust-lang.org/rust-by-example/testing/integration_testing.html

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[sbdchd]

I think I copied what rust analyzer is doing with their parser https://github.com/rust-lang/rust-analyzer/tree/master/crates/parser

They have:

• src/
• test_data/

Meanwhile, ruff https://github.com/astral-sh/ruff/tree/main/crates/ruff_python_parser has:

• src/
• resources/
• tests/

I like the test_data/ just being a bunch of non-rust files, but cool with moving the actually rust test files to tests/

[psteinroe]

I think the biggest difference is that in integration tests, you import the crate and are limited to its public api. I prefer this distinction for tests like we have here, but I will leave the decision up to you :)

[sbdchd]

@psteinroe ah that makes sense, seems fine to move them to test/!

[psteinroe]

@psteinroe ah that makes sense, seems fine to move them to test/!

can we merge this then? :)

[sbdchd]

Oops sorry!