Unbranded issues

[joheredi]

TypeSpec: https://github.com/bterlson/typespec-todo/blob/main/main.tsp

I ran this through the generator and found the following issues:

• [TCGC] - TCGC Should not refuse unknown format, but pass it through to emitters instead typespec-azure#272

• [RLC Emitter] - TypeError: Cannot read properties of undefined (reading 'type') #2289
  Reason: getSchemaForType doesn't know how to handle ModelProperty by itself, just if it comes within a Model.
  Potential Fix - The fix I tried is to check for ModelProperty and recursively call getSchemaForType on its type.

• [RLC Emitter] - RangeError: Maximum call stack size exceeded #2290
  Reason: When getEffectiveModelFromType tries to handle the models that extend Error, getEffectiveModelType resolves to Error eventually causing an infinite loop.
  Potential Fix: Not sure what the actual fix would be here, locally I hacked it to special case when getEffectiveModelType resolves to Error and return the type instead. This needs more investigation

• [RLC Emitter] - extractNameFromTypeSpecType doesn't handle anonymous models correctly. #2291
  Reason - extractNameFromTypeSpecType blindly appends ResourceMergeAndPatch to the model name. However, there are cases when instead of the model name, we have the actual anonymous model definition inline, which causes an invalid output such as body?: {"patch": TodoItemPatch;}ResourceMergeAndPatch;

  Potential Fix - in extractNameFromTypeSpecType check if the model is anonymous before appending the suffix to it

Additional investigation:

• We have to check how the @error tag is been processed if at all, it looks like RLC didn't generate isUnexpected which is unexpected (:smile:). And the errors seem to be getting generated as expected responses. #2292

• Binary data for MFD is being generated as string I think we need to generate UInt8Array at least. #2293

[joheredi]

@qiaozha @MaryGao this commit contains the fixes I tried and mentioned above. Please feel free to take as much as you want from the commit or propose different approaches

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