Add analyzer CA1876: Prefer ReadOnlySpan#51216

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copilot/add-readonlyspan-analyzer

Commits on Oct 13, 2025

Address review feedback: Use ConcurrentDictionary, consolidate conditions, handle argument passing, use existing type symbols, remove VB support, simplify type name generation

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stephentoub
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Simplify fixer code with pattern matching, add comprehensive test coverage, handle extension methods on Span

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stephentoub
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Commits on Oct 15, 2025

Commits on Oct 16, 2025