Proof Of Concept initial

Adds initial files for a proof-of-concept project, including Dockerfile, .gitignore, project files, and MQTT-related services.

This commit sets up the basic structure and configuration for exploring and validating the core concepts of the project.

Source/ProofOfConcept/ProofOfConcept.csproj

@@ -0,0 +1,42 @@
+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+    <PropertyGroup>
+        <TargetFramework>net10.0</TargetFramework>
+        <Nullable>enable</Nullable>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <NoDefaultLaunchSettingsFile>true</NoDefaultLaunchSettingsFile>
+        <InvariantGlobalization>true</InvariantGlobalization>
+        <PublishAot>true</PublishAot>
+        <DockerDefaultTargetOS>Linux</DockerDefaultTargetOS>
+    </PropertyGroup>
+
+    <ItemGroup>
+        <PackageReference Include="Mediator.Abstractions" Version="2.1.7" />
+        <PackageReference Include="Mediator.SourceGenerator" Version="2.1.7">
+          <PrivateAssets>all</PrivateAssets>
+          <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+        </PackageReference>
+        <PackageReference Include="Microsoft.AspNetCore.OpenApi" Version="10.0.0-preview.6.25358.103"/>
+        <PackageReference Include="Microsoft.Extensions.Caching.Hybrid" Version="9.7.0" />
+        <PackageReference Include="MQTTnet" Version="5.0.1.1416" />
+        <PackageReference Include="MQTTnet.Server" Version="5.0.1.1416" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <Content Include="..\.dockerignore">
+        <Link>.dockerignore</Link>
+      </Content>
+    </ItemGroup>
+
+    <ItemGroup>
+      <Folder Include="Models\" />
+      <Folder Include="Utilities\" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <None Update="Resources\Signature\public-key.pem">
+        <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+      </None>
+    </ItemGroup>
+
+</Project>