chore: organize slnx folders and clean up sample project files

- Add solution folder structure for src, test, and sample projects
- Remove redundant TargetFramework/Nullable/ImplicitUsings from sample csproj files (inherited from Directory.Build.props)

Author: perkops

Atc.Cosmos.slnx

@@ -5,6 +5,17 @@
     <BuildType Name="Release" />
     <BuildType Name="Release Preview" />
   </Configurations>
-  <Project Path="src/Atc.Cosmos/Atc.Cosmos.csproj" />
-  <Project Path="test/Atc.Cosmos.Tests/Atc.Cosmos.Tests.csproj" />
+  <Folder Name="/sample/" />
+  <Folder Name="/sample/src/">
+    <Project Path="sample/SampleApi/SampleApi/SampleApi.csproj" />
+  </Folder>
+  <Folder Name="/sample/test/">
+    <Project Path="sample/SampleApi/SampleApi.Tests/SampleApi.Tests.csproj" />
+  </Folder>
+  <Folder Name="/src/">
+    <Project Path="src/Atc.Cosmos/Atc.Cosmos.csproj" />
+  </Folder>
+  <Folder Name="/test/">
+    <Project Path="test/Atc.Cosmos.Tests/Atc.Cosmos.Tests.csproj" />
+  </Folder>
 </Solution>

sample/SampleApi/SampleApi.Tests/SampleApi.Tests.csproj

@@ -1,10 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
-    <ImplicitUsings>enable</ImplicitUsings>
-    <Nullable>enable</Nullable>
-
     <IsPackable>false</IsPackable>
   </PropertyGroup>
 

sample/SampleApi/SampleApi/SampleApi.csproj

@@ -1,9 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
-    <Nullable>enable</Nullable>
-    <ImplicitUsings>enable</ImplicitUsings>
+    <IsPackable>false</IsPackable>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">