Angular: Allow format configuration of custom source preview

[64BitAsura]

Closes #28341

What I did

Small change to angular framework, to make format as optional and stopping it enforced all the time in preview source

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  MIGRATION.MD

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[yannbf]

Hey @64BitAsura thanks for your contribution. Would you mind creating a GH issue explaining what exactly you're trying to solve in this PR? It's a bit unclear right now. If you elaborate the issue we can better review this and see whether there are more changes needed to be done. Thanks!

[64BitAsura]

Hey @64BitAsura thanks for your contribution. Would you mind creating a GH issue explaining what exactly you're trying to solve in this PR? It's a bit unclear right now. If you elaborate the issue we can better review this and see whether there are more changes needed to be done. Thanks!

As requested #28341

[greptile-apps]

PR Summary

• Made format optional in code/frameworks/angular/src/client/docs/sourceDecorator.ts
• Ensured format is not enforced in preview source
• Increased flexibility in source rendering for Angular framework

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[valentinpalkovic]

Thanks for your contribution! LGTM!