Physical property tweaking (#201)

* Simplify `is_derived`
* Remove `Variables` and old logic for enforcing shape
* Add `contributions` default subsection
* Move normalization up from the parent class
* Extend normalization to allow for normalization only once
* Add check for nesting warning with `PhysicalProperty.contributions`
* Add `PhysicalProperty.type_contribution`
* Extend chemical potential

* Add plotting function
* Add `sub_plots`
* Use pre-existing sub_plot figures or produce them
* Add check for out-of-bounds `target_index` in `PhysicalProperty.sub_plots`

* Clean dependencies
* Update ruff linting settings

---------

Co-authored-by: ndaelman <ndaelman@physik.hu-berlin.de>

Author: ndaelman-hu

src/nomad_simulations/schema_packages/outputs.py

@@ -1,7 +1,6 @@
 from typing import TYPE_CHECKING, Optional
 
 import numpy as np
-from nomad.datamodel.data import ArchiveSection
 from nomad.metainfo import Quantity, SubSection
 
 if TYPE_CHECKING:
@@ -22,7 +21,6 @@
     ElectronicEigenvalues,
     ElectronicGreensFunction,
     ElectronicSelfEnergy,
-    FermiLevel,
     FermiSurface,
     HoppingMatrix,
     HybridizationFunction,
@@ -68,8 +66,6 @@ class Outputs(Time):
         """,
     )
 
-    fermi_levels = SubSection(sub_section=FermiLevel.m_def, repeats=True)
-
     chemical_potentials = SubSection(sub_section=ChemicalPotential.m_def, repeats=True)
 
     crystal_field_splittings = SubSection(