Feature/bdew load profiles 2025

[p-snft]

Add BDEW profiles released in 2025 including new, more modular structure as discussed in #77.

• Implement
  • Base SLPs
  • Holidays
  • Other resolutions than 15 minutes
• Document
• Add tests

from demandlib.bdew import H25

time_index = pd.date_range(
    start="2020-01-01 00:00",
    end="2020-04-12 12:15",
    freq="15min",
)

profile_h25 = H25(time_index)

Changes with respect to the API for SLP 2000:

• You can create SLPs for arbitrary time ranges with arbitrary time resolution.
• Pre-factors of the dynamisation function unchanged, the annual average of the SLPs is about 1 GWh/a. (Depending on work days, holidays, etc. This is also the reason why I did not change the scaling factors of te dynamic profile.)
• You cannot give annual demands to scale the SLPs. (Just multiply the value yourself, e.g. 0.02 * H25(time_index) to have a H25 SLP for 20 MWh/a.)

Closes #77

[p-snft]

@maurerle: Before I start with docs and tests, what do you think?

[maurerle]

I did not spend too much time with this yet, so far it looks good.

The new API allows to create BDEW profiles from arbitrary timeindex length - which is nice!
And makes totally sense, given the shape of the new data.

On the other hand, it does not allow to integrate the new profiles easily into the existing API, so

e_slp.get_profiles('h0').head()
e_slp.get_profiles('h25').head()

does not work easily..

But it might be enough to somehow also provide functions which give:

bdew.H25(index15m)
bdew.H0(index15m)

and only "use" new API, which would require some tinkering for handling time indices from different years, but seems the best approach on the long run..?

[p-snft]

Everything implemented, 100 % coverage. If nobody objects, I'll merge this tomorrow.