Feat: add clamped Pockels calculation capability

[vdemestral]

I add the possibility of computing the clamped Pockels tensors into the VibroMixing class.

[cla-bot]

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[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Virginie de Mestral.
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[cla-bot]

Thank you for your pull request and welcome to our community. We could not parse the GitHub identity of the following contributors: Virginie de Mestral.
This is most likely caused by a git client misconfiguration; please make sure to:

1. check if your git client is configured with an email to sign commits git config --list | grep email
2. If not, set it up using git config --global user.email [email protected]
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[bastonero]

The code is awesome, thanks @vdemestral ! Just some minor changes!

[aiida-cla-bot]

Thank you for your submission, we really appreciate it. Like many open-source projects, we ask that you accept our Contributor License Agreement before we can merge your contribution. You can accept the CLA by just copying the sentence below and posting it as a Pull Request Comment.

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I have read the CLA Document and I hereby accept the CLA

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2 out of 3 committers have signed the CLA.
✅ (vdemestral)[https://github.com/vdemestral]
✅ (bastonero)[https://github.com/bastonero]
❌ @virginie de Mestral
Virginie de Mestral seems not to be a GitHub user. You need a GitHub account to be able to sign the CLA. If you have already a GitHub account, please add the email address used for this commit to your account.
_{You can retrigger this bot by commenting recheck in this Pull Request. Posted by the CLA Assistant Lite bot.}

[vdemestral]

I have read the CLA Document and I hereby accept the CLA

[bastonero]

recheck

[codecov]

Codecov Report

Attention: Patch coverage is 70.21277% with 14 lines in your changes missing coverage. Please review.

Project coverage is 86.45%. Comparing base (81367a0) to head (50b5a34).

Files with missing lines	Patch %	Lines
src/aiida_vibroscopy/data/vibro_mixin.py	14.28%	12 Missing ⚠️
src/aiida_vibroscopy/calculations/spectra_utils.py	93.93%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #67      +/-   ##
==========================================
- Coverage   86.77%   86.45%   -0.32%     
==========================================
  Files          34       34              
  Lines        2502     2548      +46     
==========================================
+ Hits         2171     2203      +32     
- Misses        331      345      +14     

Flag	Coverage Δ
pytests	86.45% <70.21%> (-0.32%)	⬇️

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[vdemestral]

I have read the CLA Document and I hereby accept the CLA