Implement TCGC's Model Types

[iscai-msft]

Language emitters should work to move entirely to TCGC's new ecosystem. I've created a separate issue if people want to first move to the SdkModelType and SdkEnumType. To access these types, you can access and on the type

[haolingdong-msft]

Hi @iscai-msft , I have already created an issue to integrate with TCGC models. #2564

The task breakdowns, highlights and dependent issues can be found there. I am currently tracking the progress in the issue I created.

Please let me know if you want me to track all those in this issue.

[iscai-msft]

closing in favor of #2564. I'll update my epic to using your existing issue, thanks @haolingdong-msft