chore: Cleanup editorconfig file, reorganise tests, other cleanup

[glennawatson]

• Cleanup editorconfig file, remove old settings, add description for each setting. Will be migrated to other repos in the future.
• New AOT compatibility settings for non-test, non-WPF projects targeting .NET 8.0 and above in Directory.Build.props.
• Enabled trim analyzers and set trimming warnings to be treated as errors.
• Refactored NewGameViewModel to use a cryptographically secure random number generator for shuffling player order.
• Improved readability by formatting code and adding a ShuffleCrypto method for better separation of concerns.
• Minor documentation update in SuspensionHost.cs to improve clarity.

[Copilot]

Pull request overview

This pull request performs a comprehensive cleanup and modernization of the ReactiveUI codebase, focusing on configuration improvements, security enhancements, and documentation updates.

Key Changes:

• Reorganized and enhanced the .editorconfig file with detailed categorization, comments, and expanded analyzer rules including comprehensive security rules
• Added AOT (Ahead-of-Time) compatibility settings for .NET 8.0+ projects with trim analyzers enabled
• Refactored NewGameViewModel to use cryptographically secure random number generation (RandomNumberGenerator) instead of the standard Random class

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
.editorconfig	Complete reorganization with categorized sections, descriptive comments for all rules, and extensive security analyzer configurations (CA series) covering SQL injection, XSS, deserialization, cryptography, TLS/SSL, and other security concerns
src/Directory.Build.props	Added AOT compatibility settings for non-test, non-WPF projects targeting .NET 8.0+, including IsAotCompatible flag, trim analyzers, and treating trimming warnings as errors
src/ReactiveUI.Tests/ObservedChanged/Mocks/NewGameViewModel.cs	Replaced insecure Random-based shuffling with Fisher-Yates shuffle using RandomNumberGenerator for cryptographic security; improved code formatting and separation of concerns with dedicated ShuffleCrypto method
src/ReactiveUI/Suspension/SuspensionHost.cs	Removed cref tag from AutoSuspendHelper reference in documentation comment for clarity

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 40.75%. Comparing base (fe2a8c7) to head (5727d19).
⚠️ Report is 3 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4239      +/-   ##
==========================================
+ Coverage   40.33%   40.75%   +0.42%     
==========================================
  Files         146      146              
  Lines        6655     6655              
  Branches     1025     1025              
==========================================
+ Hits         2684     2712      +28     
+ Misses       3779     3745      -34     
- Partials      192      198       +6     

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[Copilot]

Pull request overview

Copilot reviewed 43 out of 317 changed files in this pull request and generated 6 comments.

[Copilot]

Pull request overview

Copilot reviewed 224 out of 494 changed files in this pull request and generated no new comments.