Create dedicated US inputs

[finozzifa]

Changes proposed in this Pull Request

This PR addresses some of the concerns expressed by @fneum in the comment to the pull-request.

The PR proposes the following changes. Namely, it

• relocates adjust_for_inflation from scripts/compile_cost_assumptions.py to _scripts/helpers.py. The function is fact now also needed in scripts/compile_cost_assumptions_usa.py
• creates the sub-folder inputs/US where the US specific inputs used in scripts/compile_cost_assumptions_usa.py are stored
• restores manual_input.csv to its state before the pull-request, with the exception of the changes

< methanol-to-olefins/aromatics,VOM,2015,30,EUR/t_HVC,2015,"DECHEMA 2017: DECHEMA: Low carbon energy and feedstock for the European chemical industry (https://dechema.de/dechema_media/Downloads/Positionspapiere/Technology_study_Low_carbon_energy_and_feedstock_for_the_European_chemical_industry.pdf), Table 35", 
---
> methanol-to-olefins/aromatics,VOM,2015,30,€/t_HVC,2015,"DECHEMA 2017: DECHEMA: Low carbon energy and feedstock for the European chemical industry (https://dechema.de/dechema_media/Downloads/Positionspapiere/Technology_study_Low_carbon_energy_and_feedstock_for_the_European_chemical_industry.pdf), Table 35", 
196c196
< electric steam cracker,VOM,2015,180,EUR/t_HVC,2015,"DECHEMA 2017: DECHEMA: Low carbon energy and feedstock for the European chemical industry (https://dechema.de/dechema_media/Downloads/Positionspapiere/Technology_study_Low_carbon_energy_and_feedstock_for_the_European_chemical_industry.pdf), Table 35",
---
> electric steam cracker,VOM,2015,180,€/t_HVC,2015,"DECHEMA 2017: DECHEMA: Low carbon energy and feedstock for the European chemical industry (https://dechema.de/dechema_media/Downloads/Positionspapiere/Technology_study_Low_carbon_energy_and_feedstock_for_the_European_chemical_industry.pdf), Table 35",
347c347
< coal,efficiency,2020,0.356,p.u.,2023,"Lazard's levelized cost of energy analysis - version 16.0 (2023): https://www.lazard.com/media/typdgxmm/lazards-lcoeplus-april-2023.pdf , pg. 49 (Levelized Cost of Energy - Key Assumptions), accessed: 2023-12-14.","Calculated based on average of listed range, i.e. 1 / ((8.75+12) MMbtu/MWh_th /2 / (3.4095 MMbtu/MWh_th)), rounded up."
---
> coal,efficiency,2020,0.33,p.u.,2023,"Lazard's levelized cost of energy analysis - version 16.0 (2023): https://www.lazard.com/media/typdgxmm/lazards-lcoeplus-april-2023.pdf , pg. 49 (Levelized Cost of Energy - Key Assumptions), accessed: 2023-12-14.","Calculated based on average of listed range, i.e. 1 / ((8.75+12) MMbtu/MWh_th /2 / (3.4095 MMbtu/MWh_th)), rounded up."

• adds the technologies formerly added to manual_input.csv in the pull-request to inputs/US/manual_input_usa.csv
• modifies scripts/compile_cost_assumptions_usa.csv to yield the same results obtained in the pull-request, but with the US specific technologies now listed in manual_input_usa.csv
• updates the unit tests

Tests

The output files generated by scripts/compile_cost_assumptions.py are compared to the ones available at commit (the commit is the one that pre-dates the merge of the pull-request). The comparison is available in the attached file comparison.txt

Checklist

• Code changes are sufficiently documented; i.e. new functions contain docstrings and further explanations may be given in doc.
• Data source for new technologies is clearly stated.
• Newly introduced dependencies are added to environment.yaml (if applicable).
• A note for the release notes doc/release_notes.rst of the upcoming release is included.
• I consent to the release of this PR's code under the GPLv3 license.

[finozzifa]

Hi @lkstrp, thanks for your support :)

I believe that once this PR is merged, we will need a new (minor) release.

Thanks :)

Fabrizio