FEAT: Adding new method for connecting to Mechanical instance

[dipinknair]

If an instance of Mechanical is already running in specific port, this allows to connect to that using ansys.core.mechanical.Mechanical

ex:

Connect to an existing Mechanical instance at IP address ``192.168.1.30`` on port
``50001``..


>>> from ansys.mechanical.core import connect_to_mechanical
>>> pymech = connect_to_mechanical(ip='192.168.1.30', port=50001)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.21%. Comparing base (21ff37c) to head (6ad4871).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #980      +/-   ##
==========================================
- Coverage   82.24%   82.21%   -0.03%     
==========================================
  Files          35       35              
  Lines        2253     2255       +2     
==========================================
+ Hits         1853     1854       +1     
- Misses        400      401       +1     

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