Fill copyright field in .csproj files

This ensures that nuget packages will have both license and copyright fields filled.

modules/mono/editor/Godot.NET.Sdk/Godot.NET.Sdk/Godot.NET.Sdk.csproj

@@ -14,6 +14,7 @@
     <PackageType>MSBuildSdk</PackageType>
     <PackageTags>MSBuildSdk</PackageTags>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <Copyright>Copyright (c) Godot Engine contributors</Copyright>
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
 
     <!-- Exclude target framework from the package dependencies as we don't include the build output -->

modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators/Godot.SourceGenerators.csproj

@@ -14,6 +14,7 @@
     <RepositoryUrl>https://github.com/godotengine/godot/tree/master/modules/mono/editor/Godot.NET.Sdk/Godot.SourceGenerators</RepositoryUrl>
     <PackageProjectUrl>$(RepositoryUrl)</PackageProjectUrl>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <Copyright>Copyright (c) Godot Engine contributors</Copyright>
 
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <!-- Do not include the generator as a lib dependency -->

modules/mono/editor/GodotTools/GodotTools.IdeMessaging/GodotTools.IdeMessaging.csproj

@@ -12,6 +12,7 @@
     <PackageTags>godot</PackageTags>
     <RepositoryUrl>https://github.com/godotengine/godot/tree/master/modules/mono/editor/GodotTools/GodotTools.IdeMessaging</RepositoryUrl>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <Copyright>Copyright (c) Godot Engine contributors</Copyright>
     <Description>
 This library enables communication with the Godot Engine editor (the version with .NET support).
 It's intended for use in IDEs/editors plugins for a better experience working with Godot C# projects.

modules/mono/glue/GodotSharp/GodotSharp/GodotSharp.csproj

@@ -22,6 +22,7 @@
     <RepositoryUrl>https://github.com/godotengine/godot/tree/master/modules/mono/glue/GodotSharp/GodotSharp</RepositoryUrl>
     <PackageProjectUrl>$(RepositoryUrl)</PackageProjectUrl>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <Copyright>Copyright (c) Godot Engine contributors</Copyright>
 
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <IncludeSymbols>true</IncludeSymbols>

modules/mono/glue/GodotSharp/GodotSharpEditor/GodotSharpEditor.csproj

@@ -20,6 +20,7 @@
     <RepositoryUrl>https://github.com/godotengine/godot/tree/master/modules/mono/glue/GodotSharp/GodotSharpEditor</RepositoryUrl>
     <PackageProjectUrl>$(RepositoryUrl)</PackageProjectUrl>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <Copyright>Copyright (c) Godot Engine contributors</Copyright>
 
     <GeneratePackageOnBuild>true</GeneratePackageOnBuild>
     <IncludeSymbols>true</IncludeSymbols>