Add Python 3.14 to GH actions test matrix

[RDaxini]

Describe your changes

Issue ticket number and link

Fixes #297

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• This change requires a documentation update

Checklist before requesting a review

• I have performed a self-review of my code
• Code changes are covered by tests.
• Code changes have been evaluated for compatibility/integration with Scenario analysis (for future PRs)
• Code changes have been evaluated for compatibility/integration with geospatial autotemplating (for future PRs)
• New functions added to init.py
• API.rst is up to date, along with other sphinx docs pages
• Example notebooks are rerun and differences in results scrutinized
• What's new changelog has been updated in the docs

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.72%. Comparing base (2bacff5) to head (1c4fcc1).

Additional details and impacted files

@@             Coverage Diff              @@
##           development     #299   +/-   ##
============================================
  Coverage        74.72%   74.72%           
============================================
  Files               41       41           
  Lines             4823     4823           
============================================
  Hits              3604     3604           
  Misses            1219     1219           

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[RDaxini]

Looks like numba isn't supported in python 3.14 but we use it in humidity.py so this PR needs to wait until all required dependencies support 3.14