adding field axis opts + detrending for the vsd

[LemurPwned]

Summary by Sourcery

This pull request introduces new axis options ('xy', 'xz', 'yz') for external field selection, updates the excitation input range for better precision, and adds detrending functionality for the VSD spectrum.

• New Features:
  • Added support for new axis options ('xy', 'xz', 'yz') in the external field selection.
• Enhancements:
  • Updated the excitation input range in the Streamlit app from kA/m to A/m for better precision.
  • Integrated detrending functionality for the VSD spectrum using the Filters utility.

[sourcery-ai]

Reviewer's Guide by Sourcery

This pull request introduces new axis options ('xy', 'xz', 'yz') for field control in the VSD simulation, updates the frontend to support these new options, and enhances the VSD simulation by applying detrending to the spectrum data.

File-Level Changes

Files	Changes
view/simulation_fns.py view/streamlit_app.py	Added support for new axis options ('xy', 'xz', 'yz') in both the backend (simulation_fns.py) and frontend (streamlit_app.py).
view/helpers.py	Updated VSD simulation to include detrending and removed unnecessary unit conversion for Hoex_mag.

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[sourcery-ai]

Hey @LemurPwned - I've reviewed your changes and they look great!

Here's what I looked at during the review

• 🟡 General issues: 2 issues found
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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