chore: Add icon files and set application icon for installer and projects

src/EchoHub.Server/EchoHub.Server.csproj

@@ -1,5 +1,9 @@
 <Project Sdk="Microsoft.NET.Sdk.Web">
 
+  <ItemGroup>
+    <Content Include="hue_icon.ico" />
+  </ItemGroup>
+
   <ItemGroup>
     <ProjectReference Include="..\EchoHub.Core\EchoHub.Core.csproj" />
     <ProjectReference Include="..\EchoHub.Server.Irc\EchoHub.Server.Irc.csproj" />
@@ -22,6 +26,8 @@
     <TargetFramework>net10.0</TargetFramework>
     <Nullable>enable</Nullable>
     <ImplicitUsings>enable</ImplicitUsings>
+    <PackageIcon></PackageIcon>
+    <ApplicationIcon>hue_icon.ico</ApplicationIcon>
   </PropertyGroup>
 
 </Project>