bring back grpc service

[rysweet]

Restoring the grpc + Orleans server into the project

Why are these changes needed?

This is the distributed agent runtime for .NET that can manage routing messages amongst a fleet of grpc agent runtimes.

Related issue number

Checks

• I've included any doc changes needed for https://microsoft.github.io/autogen/. See https://microsoft.github.io/autogen/docs/Contribute#documentation to build and test documentation locally.
• I've added tests (if relevant) corresponding to the changes introduced in this PR.
• I've made sure all auto checks have passed.

[codecov]

Codecov Report

Attention: Patch coverage is 75.00000% with 1 line in your changes missing coverage. Please review.

Project coverage is 76.17%. Comparing base (9494ac9) to head (ecb15ae).
Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
...ft.AutoGen/Core/TypePrefixSubscriptionAttribute.cs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5377      +/-   ##
==========================================
- Coverage   78.11%   76.17%   -1.95%     
==========================================
  Files         158      196      +38     
  Lines        9590    10672    +1082     
  Branches        0      139     +139     
==========================================
+ Hits         7491     8129     +638     
- Misses       2099     2448     +349     
- Partials        0       95      +95     

Flag	Coverage Δ
unittests	76.17% <75.00%> (-1.95%)	⬇️

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Copilot reviewed 55 out of 70 changed files in this pull request and generated no comments.

Files not reviewed (15)

• dotnet/AutoGen.sln: Language not supported
• dotnet/src/Microsoft.AutoGen/AgentHost/Microsoft.AutoGen.AgentHost.csproj: Language not supported
• dotnet/src/Microsoft.AutoGen/Agents/Microsoft.AutoGen.Agents.csproj: Language not supported
• dotnet/src/Microsoft.AutoGen/Runtime.Grpc/Services/Grpc/GrpcGatewayService.cs: Evaluated as low risk
• dotnet/src/Microsoft.AutoGen/Runtime.Grpc/Abstractions/IAgentGrain.cs: Evaluated as low risk
• dotnet/src/Microsoft.AutoGen/AgentHost/Program.cs: Evaluated as low risk
• dotnet/src/Microsoft.AutoGen/Core/AgentRuntimeExtensions.cs: Evaluated as low risk
• dotnet/src/Microsoft.AutoGen/Core.Grpc/GrpcAgentRuntime.cs: Evaluated as low risk
• dotnet/src/Microsoft.AutoGen/AgentHost/Host.cs: Evaluated as low risk
• dotnet/src/Microsoft.AutoGen/Core/TypePrefixSubscriptionAttribute.cs: Evaluated as low risk
• dotnet/src/Microsoft.AutoGen/Agents/AIAgent/InferenceAgent.cs: Evaluated as low risk
• dotnet/src/Microsoft.AutoGen/Agents/protos/agent_events.proto: Evaluated as low risk
• dotnet/src/Microsoft.AutoGen/RuntimeGateway.Grpc/Abstractions/AgentsMetadata.cs: Evaluated as low risk
• dotnet/src/Microsoft.AutoGen/RuntimeGateway.Grpc/Abstractions/AgentsRegistryState.cs: Evaluated as low risk
• dotnet/src/Microsoft.AutoGen/Agents/IOAgent/ConsoleAgent/IHandleConsole.cs: Evaluated as low risk

Comments suppressed due to low confidence (3)

dotnet/src/Microsoft.AutoGen/Agents/IOAgent/FileAgent/IHandleFileIO.cs:23

• [nitpick] Defining constants inside an interface is not a common practice. Consider moving the Route constant to a class or as part of the implementation.

const string Route = "Microsoft.AutoGen.Agents.IHandleFileIO";

dotnet/src/Microsoft.AutoGen/Agents/IOAgent/IProcessIO.cs:16

• [nitpick] Static methods in interfaces are unusual and might not be intended. Consider removing the static modifier.

static Task ProcessOutputAsync(string message) { return Task.CompletedTask; }

dotnet/src/Microsoft.AutoGen/Agents/IOAgent/IProcessIO.cs:22

• [nitpick] Static methods in interfaces are unusual and might not be intended. Consider removing the static modifier.

static Task<string> ProcessInputAsync(string message) { return Task.FromResult(message); }

[lokitoth]

🛳️(ship) it