[WIP] Fix compile errors for PublishTrimmed option

[Copilot]

• Add PublishTrimmed=true to Gui.csproj and update build.sh
• Fix Common/JsonFile.cs: Add [RequiresUnreferencedCode] to generic JSON methods
• Fix Common/VersionHelpers.cs: Use JsonSerializerContext source generation for VersionCheckBody
• Fix Common/Logging/Logger.cs: Suppress StackFrame.GetMethod() IL2026
• Fix Common/Logging/ReflectionLogger.cs: Add [RequiresUnreferencedCode] and [DynamicallyAccessedMembers]
• Fix Dat/FileParsing/AttributeHelper.cs: Add [DynamicallyAccessedMembers]
• Fix Dat/FileParsing/ByteReader.cs: Add [RequiresUnreferencedCode] and [DynamicallyAccessedMembers]
• Fix Dat/FileParsing/ByteWriter.cs: Add [DynamicallyAccessedMembers]
• Fix Dat/FileParsing/SawyerStreamReader.cs: Suppress ValidationContext IL2026
• Fix Dat/FileParsing/SawyerStreamWriter.cs: Suppress Validator.TryValidateObject IL2026
• Fix Definitions/ObjectModels/Objects: Suppress LengthAttribute/ValidationContext IL2026 warnings
• Fix Definitions/ObjectModels/Serialization/LocoObjectJsonConverter.cs: Add [RequiresUnreferencedCode]
• Fix Definitions/ObjectModels/Validation/CountEqualTo.cs: Add [DynamicallyAccessedMembers]
• Fix Definitions/Web/ClientHelpers.cs: Add [RequiresUnreferencedCode]
• Fix Gui/ViewModels: Suppress BindingList and DataAnnotations IL2026 warnings

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Enable PublishTrimmed compile option</issue_title>
<issue_description>Using -p:PublishTrimmed=true in dotnet publish would greatly reduce the binary size of the application, however enabling this option currently generates compile-errors around JSON and AOT. These errors should be resolved so we can use PulishTrimmed.</issue_description>

Comments on the Issue (you are @copilot in this section)

• Fixes Enable PublishTrimmed compile option #237

---

📱 Kick off Copilot coding agent tasks wherever you are with GitHub Mobile, available on iOS and Android.