Update get_socrates script to obtain code from FormingWorlds/SOCRATES repo

[nichollsh]

Description

We have moved from nichollsh/SOCRATES to FormingWorlds/SOCRATES, which enables us to remain in sync with the Metoffice repo.

This PR updates the get_socrates.sh script to reflect this change. It is a copy of the get_socrates.sh script from AGNI.

Validation of changes

Obtains SOCRATES from correct repo and maintains all existing functionality. Tested on Fedora 43 with Python 3.12.

Checklist

• I have followed the contributing guidelines
• My code follows the style guidelines of this project
• I have performed a self-review of my code
• My changes generate no new warnings or errors
• I have checked that the tests still pass on my computer
• I have updated the docs, as appropriate
• I have added tests for these changes, as appropriate
• I have checked that all dependencies have been updated, as required

Relevant people

@timlichtenberg

[Copilot]

Pull request overview

This PR updates the SOCRATES installer script to clone from FormingWorlds/SOCRATES instead of nichollsh/SOCRATES, aligning PROTEUS with the new upstream location.

Changes:

• Adds dependency checks (NetCDF, NetCDF-Fortran, gfortran) before installation.
• Switches git clone URLs to FormingWorlds/SOCRATES.
• Adjusts install location logic and post-build validation messaging.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 69.03%. Comparing base (ee834f0) to head (d229aac).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #661   +/-   ##
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  Coverage   69.03%   69.03%           
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  Files          98       98           
  Lines       10114    10114           
  Branches     1400     1400           
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  Hits         6982     6982           
  Misses       2792     2792           
  Partials      340      340           

Flag	Coverage Δ
unit-tests	56.21% <ø> (ø)

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[timlichtenberg]

Test locally, works perfectly. Clever setup logic!