Update .gitignore and replace .slnx with .sln files

Co-authored-by: JusterZhu <11714536+JusterZhu@users.noreply.github.com>

Author: Copilot

.gitignore

@@ -194,4 +194,8 @@ FakesAssemblies/
 *.v6.1
 
 .idea/
-.vs/
+.vs/
+
+# Generated extensions directory
+**/extensions/
+*.slnx

src/Drivelution/DrivelutionSample/DrivelutionSample.sln

@@ -0,0 +1,34 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "DrivelutionSample", "DrivelutionSample.csproj", "{8015E777-C917-47A3-A335-56EBFB7063F1}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|Any CPU = Release|Any CPU
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Debug|x64.Build.0 = Debug|Any CPU
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Debug|x86.Build.0 = Debug|Any CPU
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Release|Any CPU.Build.0 = Release|Any CPU
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Release|x64.ActiveCfg = Release|Any CPU
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Release|x64.Build.0 = Release|Any CPU
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Release|x86.ActiveCfg = Release|Any CPU
+		{8015E777-C917-47A3-A335-56EBFB7063F1}.Release|x86.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal

src/Drivelution/DrivelutionSample/DrivelutionSample.slnx

@@ -0,0 +1,34 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio Version 17
+VisualStudioVersion = 17.0.31903.59
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "ExtensionSample", "ExtensionSample.csproj", "{5E892380-DB04-4680-8EB2-101A351EE9DB}"
+EndProject
+Global
+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
+		Debug|Any CPU = Debug|Any CPU
+		Debug|x64 = Debug|x64
+		Debug|x86 = Debug|x86
+		Release|Any CPU = Release|Any CPU
+		Release|x64 = Release|x64
+		Release|x86 = Release|x86
+	EndGlobalSection
+	GlobalSection(ProjectConfigurationPlatforms) = postSolution
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Debug|x64.ActiveCfg = Debug|Any CPU
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Debug|x64.Build.0 = Debug|Any CPU
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Debug|x86.ActiveCfg = Debug|Any CPU
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Debug|x86.Build.0 = Debug|Any CPU
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Release|Any CPU.Build.0 = Release|Any CPU
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Release|x64.ActiveCfg = Release|Any CPU
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Release|x64.Build.0 = Release|Any CPU
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Release|x86.ActiveCfg = Release|Any CPU
+		{5E892380-DB04-4680-8EB2-101A351EE9DB}.Release|x86.Build.0 = Release|Any CPU
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+EndGlobal