DiffViewer: strip non-English satellite assemblies from publish output

DiffViewer's own strings are hard-coded English (no .resx, no x:Uid),
so the 11 framework locale folders (cs/de/es/fr/it/ja/ko/pl/pt-BR/ru/tr)
that the .NET 8 desktop runtime ships were only localizing system
chrome — MessageBox buttons, AvalonEdit's Find panel, common dialog
strings. Setting SatelliteResourceLanguages=en drops them from the
publish output without affecting any DiffViewer-rendered UI.

Verified by clean publish: bin\Release\...\publish\ now contains only
DiffViewer.exe + DiffViewer.pdb (no locale subdirectories).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: geevensingh

DiffViewer/DiffViewer.csproj

@@ -10,6 +10,13 @@
     <RootNamespace>DiffViewer</RootNamespace>
     <AssemblyName>DiffViewer</AssemblyName>
     <ApplicationIcon>Assets\diffviewer.ico</ApplicationIcon>
+    <!-- DiffViewer's own strings are hard-coded English; no .resx, no
+         x:Uid. The 11 framework locale folders shipped by the .NET
+         desktop runtime (cs/de/es/fr/it/ja/ko/pl/pt-BR/ru/tr) only
+         localize system chrome (MessageBox buttons, AvalonEdit's Find
+         panel, etc.) so stripping them keeps the publish output small
+         without affecting our UI. -->
+    <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
   </PropertyGroup>
 
   <ItemGroup>