Expand geometry handling in `generateMeshFromGeometry()` function

[nikoscham]

This issue has been added to the FEAScript roadmap for the upcoming 0.2.0 release (https://github.com/orgs/FEAScript/discussions/17). Specifically it is related to mesh generation support for additional basic 2D shapes. The generateMeshFromGeometry() function is located in the meshGenerationScript.js.

Tasks

• Implement support for trapezoid-shaped 2D domains
• Implement support for 2D ring (annulus)-shaped domains
• Add support for expansion ratio in mesh generation (e.g., graded mesh density along one direction)