Add method for replacing the mesh

[codecov[bot]]

Codecov Report

Attention: Patch coverage is 50.00000% with 2 lines in your changes missing coverage. Please review.

Please upload report for BASE (feat/adaptive_mesh_workflow@7949116). Learn more about missing BASE report.

Files	Patch %	Lines
src/ansys/acp/core/_tree_objects/model.py	50.00%	2 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## feat/adaptive_mesh_workflow #548 +/- ## ============================================================== Coverage ? 91.98% ============================================================== Files ? 82 Lines ? 4291 Branches ? 0 ============================================================== Hits ? 3947 Misses ? 344 Partials ? 0 ```

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