feat(pipe-tubular-FEM): add specialized function for creating Tubular cable parts

[MohamedNumair]

Just added distinct geometry for tubular conductor for FEM geometry in case of being used as a pipe/sheath/armour.
Previously, the material inside the Tubular was overlapping with the existing conductors

[codecov]

Codecov Report

❌ Patch coverage is 76.59574% with 11 lines in your changes missing coverage. Please review.
✅ Project coverage is 52.23%. Comparing base (7915047) to head (b4155ea).
⚠️ Report is 18 commits behind head on main.

Files with missing lines	Patch %	Lines
src/engine/fem/cable.jl	76.59%	11 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #24      +/-   ##
==========================================
+ Coverage   52.08%   52.23%   +0.15%     
==========================================
  Files          94       94              
  Lines        6854     6901      +47     
==========================================
+ Hits         3570     3605      +35     
- Misses       3284     3296      +12     

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