Update type hints for compatibility with NumPy 2.x

[vitenti]

Description

Update type hints for compatibility with NumPy 2.x

Type of change

More type-hints and numpy array explicit conversions to satisfy mypy and numpy 2.x.

Checklist:

The following checklist will make sure that you are following the code style and
guidelines of the project as described in the
contributing page.

• I have run bash pre-commit-check and fixed any issues
• I have added tests that prove my fix is effective or that my feature works
• I have made corresponding changes to the documentation
• I have 100% test coverage for my changes (please check this after the CI system has verified the coverage)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 99.9%. Comparing base (4cd7052) to head (28ad412).
Report is 1 commits behind head on master.

Additional details and impacted files

@@          Coverage Diff           @@
##           master    #477   +/-   ##
======================================
  Coverage    99.9%   99.9%           
======================================
  Files          54      54           
  Lines        4163    4163           
======================================
  Hits         4160    4160           
  Misses          3       3           

Files with missing lines	Coverage Δ
firecrown/connector/cobaya/ccl.py	100.0% <100.0%> (ø)
firecrown/connector/mapping.py	100.0% <100.0%> (ø)
firecrown/connector/numcosmo/numcosmo.py	99.7% <100.0%> (ø)
firecrown/data_functions.py	100.0% <100.0%> (ø)
firecrown/generators/two_point.py	100.0% <100.0%> (ø)
firecrown/likelihood/gaussfamily.py	100.0% <100.0%> (ø)
firecrown/likelihood/likelihood.py	100.0% <100.0%> (ø)
firecrown/likelihood/supernova.py	100.0% <100.0%> (ø)
firecrown/likelihood/two_point.py	99.5% <ø> (ø)
firecrown/models/cluster/abundance.py	100.0% <100.0%> (ø)
... and 2 more