feat: Raise helpful missing column error message for transforms (#542)

[SiQube]

resolves #499 and additionally covers both pix2deg and pos2acc

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (2f7b54c) 100.00% compared to head (bd34f2c) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #542 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 48 48 Lines 2129 2137 +8 Branches 516 521 +5 ========================================= + Hits 2129 2137 +8 ``` | [Files Changed](https://app.codecov.io/gh/aeye-lab/pymovements/pull/542?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aeye-lab) | Coverage Δ | | |---|---|---| | [src/pymovements/gaze/gaze\_dataframe.py](https://app.codecov.io/gh/aeye-lab/pymovements/pull/542?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aeye-lab#diff-c3JjL3B5bW92ZW1lbnRzL2dhemUvZ2F6ZV9kYXRhZnJhbWUucHk=) | `100.00% <100.00%> (ø)` | |

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[SiQube]

added the requested changes