Add Meziantou.Analyzers

[viceroypenguin]

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[codecov]

Codecov Report

Attention: Patch coverage is 96.55172% with 1 line in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
src/Common/ITypeSymbolExtensions.cs	94.11%	0 Missing and 1 partial ⚠️

Files with missing lines	Coverage Δ
...mediate.Handlers.Analyzers/HandlerClassAnalyzer.cs	97.46% <100.00%> (+0.59%)	⬆️
...CodeFixes/HandlerMethodMustExistCodeFixProvider.cs	95.31% <ø> (ø)
...s/ImmediateHandlersGenerator.TransformBehaviors.cs	93.81% <100.00%> (ø)
...ors/ImmediateHandlersGenerator.TransformHandler.cs	99.04% <100.00%> (ø)
....Handlers.Generators/ImmediateHandlersGenerator.cs	97.64% <100.00%> (+0.02%)	⬆️
src/Common/ITypeSymbolExtensions.cs	99.20% <94.11%> (-0.80%)	⬇️