@azure/communication-chat: ChatMessageType should be a string literal union type

[JamesBurnside]

• Package Name: @azure/communication-chat
• Package Version: 1.0.0
• Operating system: Windows

Describe the bug
Currently ChatMessageType is just a string but it can actually only be a set of known, specific values. Having it as a string type means it does not provide any assurances to what its value could be.

azure-sdk-for-js/sdk/communication/communication-chat/src/generated/src/models/index.ts

Line 315 in 63624cc

export type ChatMessageType = string;

Expected behavior
I would expect this to be a string literal union:

export type ChatMessageType = 'text' | 'html' | 'topicUpdated' | 'participantAdded' | 'participantRemoved';

[DominikMe]

I agree with the issue

@LuChen-Microsoft & @juancamilor Do you see any reason why we wouldn't make that change?

[juancamilor]

yup, I agree, thought it was implemented that way. This happens just in JS.
@LuChen-Microsoft could you add a defect in our backlog please?

[LuChen-Microsoft]

Create an item for it https://skype.visualstudio.com/DefaultCollection/SPOOL/_backlogs/backlog/Chat/Stories/?showParents=true&workitem=2448867

[LuChen-Microsoft]

#15703