Add DXF import Example to Adaptive Templates examples

[JackB-Ansys]

New Example on Adaptive Templates showing how to set up a custom geometry from .dxf file using Adaptive Templates

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 83.98%. Comparing base (27ee958) to head (1fc06aa).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #311 +/- ## ======================================= Coverage 83.98% 83.98% ======================================= Files 20 20 Lines 1936 1936 ======================================= Hits 1626 1626 Misses 310 310 ```