Refactor for clarity; add docs and .editorconfig

Refactored code to consistently use `this.` for instance members, improving clarity and maintainability. Added XML documentation comments to multiple methods and properties for better API documentation. Streamlined `FfProbeKeyframeExtractor` logic and enhanced EBML parsing code with comments and style improvements. Introduced a new `.editorconfig` to disable legacy StyleCop and IDisposableAnalyzers rules. Updated binary files, assembly info, and NuGet cache files due to rebuilds and dependency changes. No functional changes were made.

src/Jellyfin.CodeAnalysis/obj/Debug/netstandard2.0/Jellyfin.CodeAnalysis.AssemblyInfo.cs

@@ -13,7 +13,7 @@ using System.Reflection;
 [assembly: System.Reflection.AssemblyCompanyAttribute("Jellyfin.CodeAnalysis")]
 [assembly: System.Reflection.AssemblyConfigurationAttribute("Debug")]
 [assembly: System.Reflection.AssemblyFileVersionAttribute("1.0.0.0")]
-[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+2dc0129a11d3a125fd227b7e4a86196bf919a4c8")]
+[assembly: System.Reflection.AssemblyInformationalVersionAttribute("1.0.0+e8873563856ad813cb4b7695b0aaa85c32729a4c")]
 [assembly: System.Reflection.AssemblyProductAttribute("Jellyfin.CodeAnalysis")]
 [assembly: System.Reflection.AssemblyTitleAttribute("Jellyfin.CodeAnalysis")]
 [assembly: System.Reflection.AssemblyVersionAttribute("1.0.0.0")]

src/Jellyfin.CodeAnalysis/obj/Debug/netstandard2.0/Jellyfin.CodeAnalysis.AssemblyInfoInputs.cache

@@ -1 +1 @@
-3bf9933fb90a6f3d3cf98eeedc63c2ff29157a52a9ff0ab543c63872fa45561b
+4aa28b28b5f36d3ba59b76bc7e3a9a39544dcee89f6b8e3632f4df17d7b042d4