C#: Always decode `dotnet` output as UTF-8

(cherry picked from commit e0efa3c3577795d5b5dbeef6e35b9fd74e61aa3d)

modules/mono/editor/GodotTools/GodotTools/Build/BuildSystem.cs

@@ -41,6 +41,12 @@ namespace GodotTools.Build
             startInfo.EnvironmentVariables["DOTNET_CLI_UI_LANGUAGE"]
                 = ((string)editorSettings.GetSetting("interface/editor/editor_language")).Replace('_', '-');
 
+            if (OperatingSystem.IsWindows())
+            {
+                startInfo.StandardOutputEncoding = Encoding.UTF8;
+                startInfo.StandardErrorEncoding = Encoding.UTF8;
+            }
+
             // Needed when running from Developer Command Prompt for VS
             RemovePlatformVariable(startInfo.EnvironmentVariables);
 
@@ -105,6 +111,12 @@ namespace GodotTools.Build
             startInfo.EnvironmentVariables["DOTNET_CLI_UI_LANGUAGE"]
                 = ((string)editorSettings.GetSetting("interface/editor/editor_language")).Replace('_', '-');
 
+            if (OperatingSystem.IsWindows())
+            {
+                startInfo.StandardOutputEncoding = Encoding.UTF8;
+                startInfo.StandardErrorEncoding = Encoding.UTF8;
+            }
+
             // Needed when running from Developer Command Prompt for VS
             RemovePlatformVariable(startInfo.EnvironmentVariables);
 

modules/mono/editor/GodotTools/GodotTools/Build/DotNetFinder.cs

@@ -4,6 +4,7 @@ using System.Diagnostics;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Runtime.InteropServices;
+using System.Text;
 using JetBrains.Annotations;
 using OS = GodotTools.Utils.OS;
 
@@ -58,6 +59,11 @@ namespace GodotTools.Build
                 RedirectStandardOutput = true
             };
 
+            if (OperatingSystem.IsWindows())
+            {
+                process.StartInfo.StandardOutputEncoding = Encoding.UTF8;
+            }
+
             process.StartInfo.EnvironmentVariables["DOTNET_CLI_UI_LANGUAGE"] = "en-US";
 
             var lines = new List<string>();