Handle imp and importlib cases

[iranzo]

Python deprecated imp and in 3.13 is already removed, so importlib must be used instead

[mergify]

Could you please fix the conflicts @iranzo?

[codecov]

Codecov Report

Attention: Patch coverage is 53.84615% with 18 lines in your changes missing coverage. Please review.

Project coverage is 52.38%. Comparing base (e220669) to head (8ef6883).
Report is 9 commits behind head on master.

Files with missing lines	Patch %	Lines
risuclient/shell.py	57.14%	15 Missing ⚠️
maguiclient/magui.py	0.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #983      +/-   ##
==========================================
- Coverage   52.39%   52.38%   -0.01%     
==========================================
  Files          37       37              
  Lines        2760     2791      +31     
==========================================
+ Hits         1446     1462      +16     
- Misses       1314     1329      +15     

Flag	Coverage Δ
unittests	52.38% <53.84%> (-0.01%)	⬇️

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