Refresh FTorch tutorial output for Skala 1.1

[Copilot]

The FTorch tutorial still showed stale example output from the older Skala 1.0 flow, so the documented run no longer matched the current Skala 1.1 checkpoint and feature-loading behavior. This update brings the tutorial transcript back in line with the expected model output and feature sequence.

• Documentation alignment

  • Replaced the outdated FTorch example output with the Skala 1.1 transcript.
  • Updated the feature-loading section to include the additional atomic-grid features that are now part of the expected flow.

• Example output refresh

  • Corrected the displayed energy value and the downstream potential/gradient means.
  • Updated the tensor-shape examples and representative numeric values so they match the current reference output.

[Copilot]

Pull request overview

Updates the FTorch Fortran integration tutorial to reflect the current Skala 1.1 runtime output, ensuring the documented transcript matches the checkpoint’s feature-loading sequence and representative numeric results.

Changes:

• Refreshed the tutorial console transcript (feature-loading lines, tensor shapes, and sample numeric values).
• Updated the documented XC energy value and downstream gradient mean values to match the Skala 1.1 reference run.

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[szbernat]

Verified the new output matches this tutorial, other than copilot's nitpick.