Merge "KernelBuilder" sample into KernelSyntaxExamples (microsoft#1232)

### Motivation and Context
- The KernelBuilder project contains only a single file, and has the
same intent as KernelSyntaxExamples.
- The project name, "KernelBuilder", doesn't make it clear that these
are samples, and seemingly indicates that this is the implementation of
KernelBuilder itself.
- Having this be a standalone project increases the time required to run
"dotnet format", "dotnet build", VS loading/rebuilding and other
solution-wide operations.

### Description
Merges the KernelBuilder program file into KernelSyntaxExamples,
matching the format of the other examples in that project.

dotnet/SK-dotnet.sln

@@ -31,8 +31,8 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		Directory.Build.props = Directory.Build.props
 		Directory.Build.targets = Directory.Build.targets
 		Directory.Packages.props = Directory.Packages.props
-		..\README.md = ..\README.md
 		..\.github\workflows\dotnet-format.yml = ..\.github\workflows\dotnet-format.yml
+		..\README.md = ..\README.md
 	EndProjectSection
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "SemanticKernel.UnitTests", "src\SemanticKernel.UnitTests\SemanticKernel.UnitTests.csproj", "{37E39C68-5A40-4E63-9D3C-0C66AD98DFCB}"
@@ -48,8 +48,6 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "nuget", "nuget", "{F4243136
 		nuget\NUGET.md = nuget\NUGET.md
 	EndProjectSection
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "KernelBuilder", "..\samples\dotnet\KernelBuilder\KernelBuilder.csproj", "{A52818AC-57FB-495F-818F-9E1E7BC5618C}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "GitHubSkills", "..\samples\dotnet\github-skills\GitHubSkills.csproj", "{39E5F0F6-8B36-4ECA-A5F6-FC7522DC2ECF}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Skills.OpenAPI", "src\Skills\Skills.OpenAPI\Skills.OpenAPI.csproj", "{F2A1F81E-700E-4C0E-B021-B9EF29AA20BD}"
@@ -170,11 +168,6 @@ Global
 		{107156B4-5A8B-45C7-97A2-4544D7FA19DE}.Publish|Any CPU.Build.0 = Release|Any CPU
 		{107156B4-5A8B-45C7-97A2-4544D7FA19DE}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{107156B4-5A8B-45C7-97A2-4544D7FA19DE}.Release|Any CPU.Build.0 = Release|Any CPU
-		{A52818AC-57FB-495F-818F-9E1E7BC5618C}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{A52818AC-57FB-495F-818F-9E1E7BC5618C}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{A52818AC-57FB-495F-818F-9E1E7BC5618C}.Publish|Any CPU.ActiveCfg = Release|Any CPU
-		{A52818AC-57FB-495F-818F-9E1E7BC5618C}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{A52818AC-57FB-495F-818F-9E1E7BC5618C}.Release|Any CPU.Build.0 = Release|Any CPU
 		{39E5F0F6-8B36-4ECA-A5F6-FC7522DC2ECF}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{39E5F0F6-8B36-4ECA-A5F6-FC7522DC2ECF}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{39E5F0F6-8B36-4ECA-A5F6-FC7522DC2ECF}.Publish|Any CPU.ActiveCfg = Release|Any CPU
@@ -315,7 +308,6 @@ Global
 		{9ECD1AA0-75B3-4E25-B0B5-9F0945B64974} = {831DDCA2-7D2C-4C31-80DB-6BDB3E1F7AE0}
 		{107156B4-5A8B-45C7-97A2-4544D7FA19DE} = {9ECD1AA0-75B3-4E25-B0B5-9F0945B64974}
 		{F4243136-252A-4459-A7C4-EE8C056D6B0B} = {158A4E5E-AEE0-4D60-83C7-8E089B2D881D}
-		{A52818AC-57FB-495F-818F-9E1E7BC5618C} = {FA3720F1-C99A-49B2-9577-A940257098BF}
 		{39E5F0F6-8B36-4ECA-A5F6-FC7522DC2ECF} = {FA3720F1-C99A-49B2-9577-A940257098BF}
 		{F2A1F81E-700E-4C0E-B021-B9EF29AA20BD} = {9ECD1AA0-75B3-4E25-B0B5-9F0945B64974}
 		{BC70A5D8-2125-4C37-8C0E-C903EAFA9772} = {FA3720F1-C99A-49B2-9577-A940257098BF}