feat: Add trial_columns and trialize transform() method

[codecov[bot]]

Codecov Report

Patch coverage: 100.00% and no project coverage change.

Comparison is base (8b02c28) 100.00% compared to head (c169e0e) 100.00%.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #473 +/- ## ========================================= Coverage 100.00% 100.00% ========================================= Files 48 48 Lines 2077 2086 +9 Branches 493 500 +7 ========================================= + Hits 2077 2086 +9 ``` | [Files Changed](https://app.codecov.io/gh/aeye-lab/pymovements/pull/473?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/dataset/dataset\_files.py](https://app.codecov.io/gh/aeye-lab/pymovements/pull/473?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aeye-lab#diff-c3JjL3B5bW92ZW1lbnRzL2RhdGFzZXQvZGF0YXNldF9maWxlcy5weQ==) | `100.00% <ø> (ø)` | | | [src/pymovements/dataset/dataset\_definition.py](https://app.codecov.io/gh/aeye-lab/pymovements/pull/473?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aeye-lab#diff-c3JjL3B5bW92ZW1lbnRzL2RhdGFzZXQvZGF0YXNldF9kZWZpbml0aW9uLnB5) | `100.00% <100.00%> (ø)` | | | [src/pymovements/datasets/gazebase.py](https://app.codecov.io/gh/aeye-lab/pymovements/pull/473?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aeye-lab#diff-c3JjL3B5bW92ZW1lbnRzL2RhdGFzZXRzL2dhemViYXNlLnB5) | `100.00% <100.00%> (ø)` | | | [src/pymovements/datasets/gazebasevr.py](https://app.codecov.io/gh/aeye-lab/pymovements/pull/473?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aeye-lab#diff-c3JjL3B5bW92ZW1lbnRzL2RhdGFzZXRzL2dhemViYXNldnIucHk=) | `100.00% <100.00%> (ø)` | | | [src/pymovements/datasets/judo1000.py](https://app.codecov.io/gh/aeye-lab/pymovements/pull/473?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aeye-lab#diff-c3JjL3B5bW92ZW1lbnRzL2RhdGFzZXRzL2p1ZG8xMDAwLnB5) | `100.00% <100.00%> (ø)` | | | [src/pymovements/datasets/toy\_dataset.py](https://app.codecov.io/gh/aeye-lab/pymovements/pull/473?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aeye-lab#diff-c3JjL3B5bW92ZW1lbnRzL2RhdGFzZXRzL3RveV9kYXRhc2V0LnB5) | `100.00% <100.00%> (ø)` | | | [src/pymovements/datasets/toy\_dataset\_eyelink.py](https://app.codecov.io/gh/aeye-lab/pymovements/pull/473?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=aeye-lab#diff-c3JjL3B5bW92ZW1lbnRzL2RhdGFzZXRzL3RveV9kYXRhc2V0X2V5ZWxpbmsucHk=) | `100.00% <100.00%> (ø)` | | | [src/pymovements/gaze/gaze\_dataframe.py](https://app.codecov.io/gh/aeye-lab/pymovements/pull/473?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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