Feat: Move fit_orders to config

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes are missing coverage. Please review.

Project coverage is 83.38%. Comparing base (75d7e1f) to head (5d4a510).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #48 +/- ## ========================================== - Coverage 83.45% 83.38% -0.07% ========================================== Files 12 12 Lines 1221 1222 +1 Branches 305 305 ========================================== Hits 1019 1019 - Misses 156 157 +1 Partials 46 46 ``` | [Flag](https://app.codecov.io/gh/BlueBrain/diameter-synthesis/pull/48/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BlueBrain) | Coverage Δ | | |---|---|---| | [pytest](https://app.codecov.io/gh/BlueBrain/diameter-synthesis/pull/48/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BlueBrain) | `83.38% <50.00%> (-0.07%)` | :arrow_down: | 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=BlueBrain#carryforward-flags-in-the-pull-request-comment) to find out more. | [Files](https://app.codecov.io/gh/BlueBrain/diameter-synthesis/pull/48?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BlueBrain) | Coverage Δ | | |---|---|---| | [diameter\_synthesis/simpler\_diametrizer.py](https://app.codecov.io/gh/BlueBrain/diameter-synthesis/pull/48?src=pr&el=tree&filepath=diameter_synthesis%2Fsimpler_diametrizer.py&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=BlueBrain#diff-ZGlhbWV0ZXJfc3ludGhlc2lzL3NpbXBsZXJfZGlhbWV0cml6ZXIucHk=) | `73.40% <50.00%> (-0.79%)` | :arrow_down: |