minor: .prettierignore is not functional

[mmikhasenko]

Just wasted two hours trying to understand prettier errors. It's just unintuitive.

Meanwhile, realized that our ignore file with *.ipynn won't work (checked it with test.ipynb)
https://github.com/RUB-EP1/amplitude-serialization/blob/main/.prettierignore

It seems that to ignore all notebooks, one has to write **/.ipynb
https://prettier.io/docs/en/ignore

[redeboer]

Sorry to hear :( Strange that they write ".prettierignore uses gitignore syntax", in which case *.ipynb should be fine... Anyway, #81 fixes this.

[redeboer]

Just wasted two hours trying to understand prettier errors. It's just unintuitive.

We may want to switch to Biome, one of the many upcoming Rust-based formatters that is faster than (in this case) Prettier.