Add initial implementation of DispatcherAgent with configuration and telemetry support

[MattB-msft]

Introduce the DispatcherAgent with essential models, configuration files, and telemetry capabilities to facilitate bot interactions and performance tracking.

[tracyboehrer]

Why this instead of ServiceCollectionExtensions.AddBot and adding additional DI separately?

[rido-min]

I'm seeing some warnings

/workspaces/Agents/samples/complex/dispatcher/dotnet/Dispatcher/DispatcherAgent.csproj : warning NU1507: There are 2 package sources defined in your configuration. When using central package management, please map your package sources with package source mapping (https://aka.ms/nuget-package-source-mapping) or specify a single package source. The following sources are defined: NightlyFeed, nuget.org

/workspaces/Agents/samples/complex/dispatcher/dotnet/Dispatcher/DispatcherBot.cs(27,29): warning CS9124: Parameter 'IStorage storage' is captured into the state of the enclosing type and its value is also used to initialize a field, property, or event. [/workspaces/Agents/samples/complex/dispatcher/dotnet/Dispatcher/DispatcherAgent.csproj]

/workspaces/Agents/samples/complex/dispatcher/dotnet/Dispatcher/Model/MCSAgents.cs(180,58): warning CS1998: This async method lacks 'await' operators and will run synchronously. Consider using the 'await' operator to await non-blocking API calls, or 'await Task.Run(...)' to do CPU-bound work on a background thread. [/workspaces/Agents/samples/complex/dispatcher/dotnet/Dispatcher/DispatcherAgent.csproj]

[rido-min]

Comments are not permitted in JSON, and shows errors in VSCode

[rido-min]

Can we split the methods in this class to other classes with better names? Seems to me the methods to get the conversation links should be in a different class that then ones related to oauth flows

[ridomin]

this line throws NRE if config is not set