Fix: MN Template Selection

[BradyAJohnston]

There was an error with selecting the startup Molecular Nodes template.

Disabling the uninstall on unregister() fixes the problem. Not a great
solution but for the time being this will have to do.

• removing uninstall fixes template startup
• add makefile for template

[codecov]

Codecov Report

Patch coverage has no change and project coverage change: +0.02% 🎉

Comparison is base (8affccd) 59.14% compared to head (243a5a9) 59.17%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #301      +/-   ##
==========================================
+ Coverage   59.14%   59.17%   +0.02%     
==========================================
  Files          20       20              
  Lines        2367     2366       -1     
==========================================
  Hits         1400     1400              
+ Misses        967      966       -1     

Files Changed	Coverage Δ
MolecularNodes/__init__.py	66.66% <0.00%> (+4.16%)	⬆️

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.