Set stdout encoding to something byte-friendly when using bytes

[riesentoaster]

What and why

Fixes #690

Description of the problem see issue

How was it tested?

Added unit tests

Checklist

• Does one thing, and the diff is limited to what that needs
• Tests cover any changed behaviour
• Docs updated, if this changes something a user can see
• pre-commit and make tests pass locally
• make lock was run, if pyproject.toml dependencies changed
• I understand what every changed line does and why it is there
• I wrote this description myself, and said above if the change was
  substantially AI-assisted

[github-actions]

Bencher Report

Project	fandango
Branch	fix/stdout-encoding
Testbed	ubuntu-latest

Click to view all benchmark results

Benchmark	Latency	Benchmark Result milliseconds (ms) (Result Δ%)	Upper Boundary milliseconds (ms) (Limit %)
tests/test_benchmarks.py::test_generate_with_single_hard_constraint	📈 view plot 🚷 view threshold	1,634.04 ms (-12.96%) Baseline: 1,877.36 ms	2,188.88 ms (74.65%)
tests/test_benchmarks.py::test_generate_with_single_soft_constraint	📈 view plot 🚷 view threshold	76,950.28 ms (+40.27%) Baseline: 54,859.76 ms	89,482.60 ms (85.99%)
tests/test_benchmarks.py::test_init_fandango	📈 view plot 🚷 view threshold	162.43 ms (+7.12%) Baseline: 151.64 ms	168.88 ms (96.18%)
tests/test_benchmarks.py::test_parse_spec	📈 view plot 🚷 view threshold	162.52 ms (+6.42%) Baseline: 152.71 ms	169.07 ms (96.13%)

🐰 View full continuous benchmarking report in Bencher

[alex9849]

The command line looks good for me, however, there are unit tests related to output dumping that are failing now.

[riesentoaster]

Already on it.

I redacted dislike Windows.