add generic electrolyzer kinds + correct electrolyzer FOM US (#222)

* add generic electrolyzer kinds + correct electrolyzer FOM US

* update release notes

* update unit tests after removing fossil- and biomass-based H2 production from manual_inputs_usa

* fix units for coal gasification and biomass-based H2 production

* address review

* add blue hydrogen production and heavy oil partial oxidation

* update unit tests

* distinguish medium and large electrolyzer, add note on PEM lifetime

* update currency year

* remove unnecessary lock files

Author: danielelerede-oet

docs/release_notes.rst

@@ -16,6 +16,8 @@ Upcoming Release
 ..   The features listed below are not released yet, but will be part of the next release! 
 ..   To use the features already you have to use the ``master`` branch.
 
+* Add several H2 production technologies (generic cost assumptions), fix FOM values and rename of efficiency to electricity-input in US cost assumptions for US-specific electrolyzer costs (https://github.com/PyPSA/technology-data/pull/222)
+
 `v0.12.0 <https://github.com/PyPSA/technology-data/releases/tag/v0.12.0>`__ (19th May 2025)
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