Diffable CS improvements

[ds5678]

Improvements:

• Handle all access modifiers
• Support nint and nuint
• Added properties to EventAnalysisContext, PropertyAnalysisContext, MethodAnalysisContext, and TypeAnalysisContext
• Support delegate type kind
• Improve accuracy of the virtual lookup keywords
• Switch from StringBuilder to IndentedTextWriter (AI-written)

[coveralls]

Coverage Report for CI Build 28842709595

Coverage increased (+0.2%) to 36.304%

Details

• Coverage increased (+0.2%) from the base build.
• Patch coverage: 18 uncovered changes across 4 files (249 of 267 lines covered, 93.26%).
• No coverage regressions found.

Uncovered Changes

File	Changed	Covered	%
Cpp2IL.Core/Utils/CsFileUtils.cs	107	97	90.65%
Cpp2IL.Core/OutputFormats/DiffableCsOutputFormat.cs	123	119	96.75%
Cpp2IL.Core/Model/Contexts/EventAnalysisContext.cs	18	15	83.33%
Cpp2IL.Core/Model/Contexts/PropertyAnalysisContext.cs	17	16	94.12%
Total (6 files)	267	249	93.26%

Coverage Regressions

No coverage regressions found.

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Coverage Stats

Relevant Lines:	12948
Covered Lines:	5078
Line Coverage:	39.22%
Relevant Branches:	8570
Covered Branches:	2734
Branch Coverage:	31.9%
Branches in Coverage %:	Yes
Coverage Strength:	170756.73 hits per line

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💛 - Coveralls