Add support for different science energy channels configurations

[samaloney]

• Add code to parse science energy index file into interval tree
• Add code to lookup by date and parse science energy channel definitions
• Small refactor of the code for transforming lb to l0 for BSD spectrogram (left over todo) and was changing the same area

[codecov-commenter]

Codecov Report

Base: 81.02% // Head: 81.23% // Increases project coverage by +0.21% :tada:

Coverage data is based on head (eef17bb) compared to base (86ab581). Patch coverage: 91.02% of modified lines in pull request are covered.

:mega: This organization is not using Codecov’s GitHub App Integration. We recommend you install it so Codecov can continue to function properly for your repositories. Learn more

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #297 +/- ## ========================================== + Coverage 81.02% 81.23% +0.21% ========================================== Files 63 63 Lines 6473 6519 +46 ========================================== + Hits 5245 5296 +51 + Misses 1228 1223 -5 ``` | [Impacted Files](https://codecov.io/gh/i4Ds/STIXCore/pull/297?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=i4Ds) | Coverage Δ | | |---|---|---| | [stixcore/products/common.py](https://codecov.io/gh/i4Ds/STIXCore/pull/297?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=i4Ds#diff-c3RpeGNvcmUvcHJvZHVjdHMvY29tbW9uLnB5) | `75.00% <63.63%> (+0.77%)` | :arrow_up: | | [stixcore/products/product.py](https://codecov.io/gh/i4Ds/STIXCore/pull/297?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=i4Ds#diff-c3RpeGNvcmUvcHJvZHVjdHMvcHJvZHVjdC5weQ==) | `86.56% <83.33%> (+0.12%)` | :arrow_up: | | [stixcore/products/level0/scienceL0.py](https://codecov.io/gh/i4Ds/STIXCore/pull/297?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=i4Ds#diff-c3RpeGNvcmUvcHJvZHVjdHMvbGV2ZWwwL3NjaWVuY2VMMC5weQ==) | `85.96% <95.00%> (ø)` | | | [stixcore/config/reader.py](https://codecov.io/gh/i4Ds/STIXCore/pull/297?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=i4Ds#diff-c3RpeGNvcmUvY29uZmlnL3JlYWRlci5weQ==) | `98.52% <97.50%> (-1.48%)` | :arrow_down: | | [stixcore/io/fits/processors.py](https://codecov.io/gh/i4Ds/STIXCore/pull/297?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=i4Ds#diff-c3RpeGNvcmUvaW8vZml0cy9wcm9jZXNzb3JzLnB5) | `76.29% <100.00%> (ø)` | | | [stixcore/processing/L0toL1.py](https://codecov.io/gh/i4Ds/STIXCore/pull/297?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=i4Ds#diff-c3RpeGNvcmUvcHJvY2Vzc2luZy9MMHRvTDEucHk=) | `78.40% <0.00%> (+6.81%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=i4Ds). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=i4Ds)

:umbrella: View full report at Codecov.
:loudspeaker: Do you have feedback about the report comment? Let us know in this issue.

[samaloney]

The e2e test fail is expected as remove an erroneous energy HDU from aspect fits files.