Add trailing newline to pixi.toml and .gitignore

[pavelzw]

Closes #214

https://docs.rs/minijinja/latest/minijinja/syntax/index.html#trailing-newlines

MiniJinja, like Jinja2, will remove one trailing newline from the end of the file automatically on parsing. This lets templates produce a consistent output no matter if the editor adds a trailing newline or not. If one wants a trailing newline an extra newline can be added or the code rendering it adds it manually.

[baszalmstra]

thaaaank youuu 😁