Implement lin_to_quad for wedges and to_serendipity

[amgebauer]

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[Copilot]

Pull Request Overview

This PR implements comprehensive mesh adaptation functionality by adding support for wedge elements in linear-to-quadratic conversion and introducing a new serendipity element conversion feature. The implementation refactors the existing lin_to_quad function to use a more flexible architecture based on an adaptable scheme pattern.

• Refactored mesh adaptation using a generalized adapt_mesh function with customizable adapting schemes
• Added support for wedge elements (3D triangular prisms) in linear-to-quadratic conversion
• Implemented to_serendipity function for converting hexahedral elements to 20-node serendipity elements

Reviewed Changes

Copilot reviewed 8 out of 8 changed files in this pull request and generated 1 comment.

File	Description
src/biomesh/adapt.py	Core implementation of refactored adaptation architecture and new serendipity conversion
tests/test_adapt.py	Added comprehensive test coverage for hex8→hex27, tet4→tet10, and hex8→hex20 conversions
tests/data/*.vtu	Added reference mesh files for validating adaptation algorithms
pyproject.toml	Version bump to 0.6.0

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[davidrudlstorfer]

Nice features :)

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