Switch to official gRPC GrokClient and fix function calling

We model the hosted tool content so that responses can include them if needed by the client.

Author: kzu

.netconfig

@@ -168,71 +168,4 @@
     url = https://github.com/andrewlock/NetEscapades.Configuration/blob/master/src/NetEscapades.Configuration.Yaml/YamlConfigurationStreamParser.cs
     weak
 	sha = a1ec2c6746d96b4f6f140509aa68dcff09271146
-	etag = 9e5c6908edc34eb661d647671f79153d8f3a54ebdc848c8765c78d2715f2f657
-[file "src/Extensions.Grok/proto/."]
-	url = https://github.com/xai-org/xai-proto/tree/main/proto/xai/api/v1/
-[file "src/Extensions.Grok/proto/auth.proto"]
-	url = https://github.com/xai-org/xai-proto/blob/main/proto/xai/api/v1/auth.proto
-	sha = 626a3a3f22d8aa11c7a185bf8902e7d415df0462
-	etag = ea074da4f67b67ebf0e8a0b2114a1720d6b3176a8324aa1cfd22740e78049d80
-	weak
-[file "src/Extensions.Grok/proto/chat.proto"]
-	url = https://github.com/xai-org/xai-proto/blob/main/proto/xai/api/v1/chat.proto
-	sha = afc88be2698cf4fb5ad476734d02b931241c0624
-	etag = b451f89cb67e77a021f258babf6b52118570afff3de53d2bf4463a1076031e69
-	weak
-[file "src/Extensions.Grok/proto/deferred.proto"]
-	url = https://github.com/xai-org/xai-proto/blob/main/proto/xai/api/v1/deferred.proto
-	sha = 626a3a3f22d8aa11c7a185bf8902e7d415df0462
-	etag = d47b84dddfc4252abbced302fde18ea8093933a3a8d5516350db596d3ae86595
-	weak
-[file "src/Extensions.Grok/proto/documents.proto"]
-	url = https://github.com/xai-org/xai-proto/blob/main/proto/xai/api/v1/documents.proto
-	sha = 736b835b0c0dd93698664732daad49f87a2fbc6f
-	etag = 3719cf7bc6280bc244ec25290be31fc925c95d0833f5fe282d9d0be805827ec6
-	weak
-[file "src/Extensions.Grok/proto/embed.proto"]
-	url = https://github.com/xai-org/xai-proto/blob/main/proto/xai/api/v1/embed.proto
-	sha = 626a3a3f22d8aa11c7a185bf8902e7d415df0462
-	etag = e39d176e278c4b31be375fe8bd7a21a17fceb61422b38fb0ba0341bdb58e6b36
-	weak
-[file "src/Extensions.Grok/proto/image.proto"]
-	url = https://github.com/xai-org/xai-proto/blob/main/proto/xai/api/v1/image.proto
-	sha = 626a3a3f22d8aa11c7a185bf8902e7d415df0462
-	etag = 72140789ccabd84bb51e0120c4b86f78ffa03de324410887034c8c45684004c6
-	weak
-[file "src/Extensions.Grok/proto/models.proto"]
-	url = https://github.com/xai-org/xai-proto/blob/main/proto/xai/api/v1/models.proto
-	sha = 626a3a3f22d8aa11c7a185bf8902e7d415df0462
-	etag = af6557257e396c857f85997e118358a689a5627303d0d4c89124aae0691813c5
-	weak
-[file "src/Extensions.Grok/proto/sample.proto"]
-	url = https://github.com/xai-org/xai-proto/blob/main/proto/xai/api/v1/sample.proto
-	sha = 6c67dda8aed9c1c82cb75d4548c14785c43c654c
-	etag = 0749bb07dcf0078c5cf5832b7c78abec3a332197d83781eacc57999af8846a65
-	weak
-[file "src/Extensions.Grok/proto/tokenize.proto"]
-	url = https://github.com/xai-org/xai-proto/blob/main/proto/xai/api/v1/tokenize.proto
-	sha = 626a3a3f22d8aa11c7a185bf8902e7d415df0462
-	etag = 000b345ae3d238d6be847eb8336b22f89d43a8bc1876d0bebfb81c1930260f2e
-	weak
-[file "src/Extensions.Grok/proto/usage.proto"]
-	url = https://github.com/xai-org/xai-proto/blob/main/proto/xai/api/v1/usage.proto
-	sha = afc88be2698cf4fb5ad476734d02b931241c0624
-	etag = e760ecb2f328565e57bbd0ad1fec6a62004088c8b217c0cb178653cd2c1bf432
-	weak
-[file "src/Extensions.Grok/Extensions/Throw.cs"]
-	url = https://github.com/devlooped/catbag/blob/main/System/Throw.cs
-	sha = 3012d56be7554c483e5c5d277144c063969cada9
-	etag = 43c81c6c6dcdf5baee40a9e3edc5e871e473e6c954c901b82bb87a3a48888ea0
-	weak
-[file "src/Extensions.Grok/proto/google/protobuf/timestamp.proto"]
-	url = https://github.com/protocolbuffers/protobuf/blob/main/src/google/protobuf/timestamp.proto
-	sha = 71f247a9cf5ddcd310d8aa5e05cea2acc72f9a7f
-	etag = ca7512680f5ac0d26b57c5cfebca26d906112e3cb02a9739bad342ad70a45ed5
-	weak
-[file "src/Extensions.Grok/proto/google/protobuf/empty.proto"]
-	url = https://github.com/protocolbuffers/protobuf/blob/main/src/google/protobuf/empty.proto
-	sha = 407aa2d9319f5db12964540810b446fecc22d419
-	etag = 0dca55f20a72d3279554837f4eba867a1de37fe0f4a7535c2d9bc43867361cc5
-	weak
+	etag = 9e5c6908edc34eb661d647671f79153d8f3a54ebdc848c8765c78d2715f2f657

src/Extensions.Grok/ClientPipelineCallInvoker.cs

@@ -14,17 +14,14 @@
 
   <ItemGroup>
     <PackageReference Include="Google.Protobuf" Version="3.33.1" />
+    <PackageReference Include="GrokClient" Version="1.0.0" />
     <PackageReference Include="Grpc.Net.Client" Version="2.71.0" />
     <PackageReference Include="Grpc.Tools" Version="2.76.0" PrivateAssets="all" />
     <PackageReference Include="NuGetizer" Version="1.4.5" PrivateAssets="all" />
     <PackageReference Include="Microsoft.Extensions.AI.Abstractions" Version="10.0.0" />
     <PackageReference Include="System.ClientModel" Version="1.8.1" />
   </ItemGroup>
 
-  <ItemGroup>
-    <Protobuf Include="proto\*.proto" GrpcServices="Client" ProtoRoot="proto" />
-  </ItemGroup>
-
   <ItemGroup>
     <Compile Include="..\Extensions\Extensions\ChatOptionsExtensions.cs" Link="Extensions\ChatOptionsExtensions.cs" />
   </ItemGroup>