chore(deps): update ModelContextProtocol to 0.8.0-preview.1

Update both ModelContextProtocol and ModelContextProtocol.AspNetCore from 0.2.0-preview.2 to 0.8.0-preview.1, the latest available version. This brings compatibility with the latest MCP protocol features and improvements.

Author: shaiku

src/CodingWithCalvin.MCPServer.Server/CodingWithCalvin.MCPServer.Server.csproj

@@ -14,9 +14,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="ModelContextProtocol" Version="0.2.0-preview.2" />
+    <PackageReference Include="ModelContextProtocol" Version="0.8.0-preview.1" />
     <PackageReference Include="System.CommandLine" Version="2.0.0-beta4.22272.1" />
-    <PackageReference Include="ModelContextProtocol.AspNetCore" Version="0.2.0-preview.2" />
+    <PackageReference Include="ModelContextProtocol.AspNetCore" Version="0.8.0-preview.1" />
     <PackageReference Include="StreamJsonRpc" Version="2.20.20" />
   </ItemGroup>