Suppress WinForms trim errors in build and project

Added the _SuppressWinFormsTrimError property to the build-release and build-test GitHub Actions workflows and to FFmpegInstaller.csproj. This change prevents build failures due to WinForms trimming errors during publish.

Author: oop7

.github/workflows/build-release.yml

@@ -64,6 +64,7 @@ jobs:
             -p:PublishSingleFile=true `
             -p:PublishReadyToRun=true `
             -p:PublishTrimmed=true `
+            -p:_SuppressWinFormsTrimError=true `
             -p:EnableCompressionInSingleFile=true `
             -o ./publish
       

.github/workflows/build-test.yml

@@ -61,6 +61,7 @@ jobs:
             -p:PublishSingleFile=true `
             -p:PublishReadyToRun=true `
             -p:PublishTrimmed=true `
+            -p:_SuppressWinFormsTrimError=true `
             -p:EnableCompressionInSingleFile=true `
             -o ./publish
       

FFmpegInstaller.csproj

@@ -19,6 +19,7 @@
     <SelfContained>true</SelfContained>
     <PublishReadyToRun>true</PublishReadyToRun>
     <PublishTrimmed>true</PublishTrimmed>
+    <_SuppressWinFormsTrimError>true</_SuppressWinFormsTrimError>
     <EnableCompressionInSingleFile>true</EnableCompressionInSingleFile>
     <IncludeNativeLibrariesForSelfExtract>true</IncludeNativeLibrariesForSelfExtract>
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>