release: prepare 0.13.2

[0xC000005]

Summary

• Bump package version to 0.13.2.
• Move the slider high-dimensional diagnostic overflow fix and docs-navigation update into the 0.13.2 changelog section.
• Update package validation baseline to 0.13.1.
• Refresh user-facing package/version examples and issue-template placeholders.

Release Notes

Patch release for #182 / #183. ChebyshevSlider.Build() and ChebyshevSlider.ToString() no longer throw from full-grid diagnostic arithmetic when a high-dimensional slider has tractable per-slide partitions.

Validation

• dotnet restore
• git diff --check
• dotnet format --verify-no-changes --verbosity minimal
• dotnet build --configuration Release --no-restore --verbosity minimal
• dotnet run --configuration Release --no-build --project examples/QuickStart/QuickStart.csproj
• dotnet run --configuration Release --no-build --project examples/TensorTrainHighDim/TensorTrainHighDim.csproj
• dotnet test --configuration Release --no-build --verbosity minimal (1,649 passed)
• dotnet pack src/ChebyshevSharp --configuration Release --no-build --output artifacts/packages
• docfx docs/docfx.json

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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