[ENH] Refactor mesh extraction and add scalar field at interface to structural elements | | GEN-12031

[Leguark]

Description

Refactored the mesh extraction process using marching cubes algorithm to improve accuracy and efficiency. The main changes include:

1. Renamed scalar_field to scalar_field_at_interface in the StructuralElement class for better clarity
2. Added proper assignment of scalar field values to structural elements
3. Simplified the mesh extraction logic by using the output group's scalar field matrix and mask directly
4. Improved the marching cubes implementation with proper parameters (allow_degenerate=False, method="lewiner")
5. Added comprehensive tests to verify the mesh extraction results

Relates to #mesh-extraction-improvements

Checklist

• My code uses type hinting for function and method arguments and return values.
• I have created tests which cover my code.
• The test code either 1. demonstrates at least one valuable use case (e.g. integration tests)
  or 2. verifies that outputs are as expected for given inputs (e.g. unit tests).
• New tests pass locally with my changes.

[graphite-app]

Graphite Automations

"Add gempy label" took an action on this PR • (05/01/25)

1 label was added to this PR based on Miguel de la Varga's automation.

[Leguark]

Merge activity

• May 2, 5:28 AM EDT: A user started a stack merge that includes this pull request via Graphite.
• May 2, 5:29 AM EDT: Graphite rebased this pull request as part of a merge.
• May 2, 6:27 AM EDT: Graphite rebased this pull request as part of a merge.
• May 2, 6:36 AM EDT: @Leguark merged this pull request with Graphite.

[Leguark]

• [ENH] Refactor mesh extraction and add scalar field at interface to structural elements | | GEN-12031 #1019 👈 (View in Graphite)
• [ENH] Improve marching cubes mesh extraction with masking support | GEN-12031 #1006
• [FEATURE] Add mesh extraction module using marching cubes algorithm | GEN-12031 #1005
• [ENH/WIP] Adding first test to implement marching cubes #1000
• main

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