Remove old icon and update project references

- Deleted the binary file `icon.png`.
- Updated `PackageIcon` paths in project files to remove dependency on `Assets\icon.png`.
- Added a new `None` item in `DigitalData.EmailProfilerDispatcher.Abstraction.csproj` to include `..\Assets\icon.png`.
- Created a new project section for "Solution Items" in `DigitalData.EmailProfilerDispatcher.sln` to include `icon.png`.
- Removed the previous `ItemGroup` for `None` that updated `Assets\icon.png`.
- The binary file `icon.png` was replaced with a new version.

DigitalData.EmailProfilerDispatcher.Abstraction/DigitalData.EmailProfilerDispatcher.Abstraction.csproj

@@ -9,7 +9,7 @@
     <Company>Digital Data GmbH</Company>
     <Description>This package provides the necessary abstractions and interfaces for the DigitalData.EmailProfilerDispatcher library, facilitating a clean and decoupled architecture.</Description>
     <Copyright>Copyright 2024</Copyright>
-    <PackageIcon>Assets\icon.png</PackageIcon>
+    <PackageIcon>icon.png</PackageIcon>
     <RepositoryUrl>http://git.dd:3000/AppStd/EmailProfilerDispatcher.git</RepositoryUrl>
     <PackageTags>digital data email dispatcher abstraction</PackageTags>
     <Version>3.0.0</Version>
@@ -18,14 +18,14 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="DigitalData.Core.Abstractions" Version="3.4.0" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <None Update="Assets\icon.png">
+    <None Include="..\Assets\icon.png">
       <Pack>True</Pack>
       <PackagePath>\</PackagePath>
     </None>
   </ItemGroup>
 
+  <ItemGroup>
+    <PackageReference Include="DigitalData.Core.Abstractions" Version="3.4.0" />
+  </ItemGroup>
+
 </Project>