Remove .NET 4.5 targets and update to .NET 9#80

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mchaloupka wants to merge 3 commits intomasterfrom

claude/update-dotnet

Commits on Jan 21, 2026

Remove .NET 4.5 targets and update to .NET 9

mchaloupka
and
claude
committed
Add macOS to CI build matrix

mchaloupka
and
claude
committed

Commits on Jan 23, 2026

Enable debugging breakpoints in .NET Core
mchaloupka
committed