feat: improve interval parsing

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 81.95%. Comparing base (490e4f7) to head (e7cd9ea). Report is 1 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #271 +/- ## ========================================== + Coverage 81.33% 81.95% +0.61% ========================================== Files 97 97 Lines 8017 8017 ========================================== + Hits 6521 6570 +49 + Misses 1496 1447 -49 ``` | [Flag](https://app.codecov.io/gh/open-space-collective/open-space-toolkit-physics/pull/271/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-space-collective) | Coverage Δ | | |---|---|---| | [](https://app.codecov.io/gh/open-space-collective/open-space-toolkit-physics/pull/271/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-space-collective) | `81.95% <100.00%> (+0.61%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=open-space-collective#carryforward-flags-in-the-pull-request-comment) to find out more.

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