chore: updates to Go 1.25 and refactors some code

[codefromthecrypt]

Description

This updates to Go 1.25 and uses some new features.

See https://tip.golang.org/doc/go1.25

[codecov-commenter]

Codecov Report

❌ Patch coverage is 98.30508% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 78.55%. Comparing base (293cc0a) to head (751057f).

Files with missing lines	Patch %	Lines
tests/internal/testenvironment/test_environment.go	0.00%	1 Missing ⚠️

❌ Your project status has failed because the head coverage (78.55%) is below the target coverage (86.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1077      +/-   ##
==========================================
+ Coverage   78.29%   78.55%   +0.26%     
==========================================
  Files          82       82              
  Lines        9642     9639       -3     
==========================================
+ Hits         7549     7572      +23     
+ Misses       1734     1716      -18     
+ Partials      359      351       -8     

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[gonzaloserrano]

In case you find it useful: https://pkg.go.dev/golang.org/x/tools/gopls/internal/analysis/modernize

go run golang.org/x/tools/gopls/internal/analysis/modernize/cmd/modernize@latest -fix -test ./...

[codefromthecrypt]

@gonzaloserrano thanks a lot! added! (except json tag changes)

Note it seems coverage changed a bit hence we're not hitting targets like before..

[codefromthecrypt]

I will try to vibe some coverage to get us over the line

[mathetake]

looking cool... the discussion was that we will start using 1.25 after v0.3 which will happen within a few days 🤞

[codefromthecrypt]

cool as I'm out of time vibing for the next few days anyway ;)