chore: add tryAGI.DeepL NuGet PackageId

Bare "DeepL" name is already taken on NuGet.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: HavenDV

src/libs/DeepL/DeepL.csproj

@@ -5,6 +5,7 @@
   </PropertyGroup>
 
   <PropertyGroup Label="Nuget">
+    <PackageId>tryAGI.DeepL</PackageId>
     <Description>C# SDK based on DeepL OpenAPI specification.</Description>
     <PackageTags>api;client;sdk;dotnet;swagger;openapi;specification;generated;nswag</PackageTags>
   </PropertyGroup>