.NET: Passing ChatClientAgent specific run options

[westey-m]

Today we have multiple approaches to passing ChatClientAgent specific run options:

1. RunAsync, which takes AgentRunOptions? options as input, can be passed a ChatClientAgentRunOptions
2. We have a RunAsync overload in ChatClientAgentExtensions which takes AgentRunOptions? agentRunOptions and ChatOptions? chatOptions as input.
   1. Since ChatClientAgentRunOptions is a subclass of AgentRunOptions, it can in theory be passed to this overload. ChatClientAgentRunOptions contains a ChatOptions inside of it, so it's unclear what would happen if someone passed both ChatClientAgentRunOptions and ChatOptions.

Since the 2nd method has some ambiguity, I propose that we remove it and only keep the original RunAsync method.

[rogerbarreto]

Alternatively

1. Change the 2nd to instead of getting AgentRunOptions expect the specialization directly ChatClientAgentRunOptions

Some extra thoughts.

How about internalize the ChatClientAgentRunOptions completely, so we avoid adding this ambiguity in the apis and resort to something like: ChatClientAgentRunOptions agentOptions.WithChatOptions(ChatOptions)