Added comments for the CSharp API surface

[chschrae]

No description provided.

[jhakulin]

namespace macaroni;

Will this be the namespace we will expose to customer. Or should this be Azure.AI.something?

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Refers to: src/cs/Interfaces/ICommandSystem.cs:4 in f23e159. [](commit_id = f23e159, deletion_comment = True)

[jhakulin]

using Microsoft.CognitiveServices.Speech;

No copyrights in the files, we need to add them at some point

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Refers to: src/cs/Interfaces/ICommandSystem.cs:1 in f23e159. [](commit_id = f23e159, deletion_comment = True)

[jhakulin]

internal class ConfigUiBuilder : IConfigureUiBuilder

Ui is normally all capital -> UI

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Refers to: src/cs/CommandSystemBuilder/ConfigUiBuilder.cs:5 in f23e159. [](commit_id = f23e159, deletion_comment = False)

[jhakulin]

public interface ICommandSystem : IHost

All interface classes would probably benefit from descriptions describing the purpose of the class

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Refers to: src/cs/Interfaces/ICommandSystem.cs:6 in f23e159. [](commit_id = f23e159, deletion_comment = False)