[compiler] Use new diagnostic printing in playground #33767
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Enable more validations to help catch bad patterns, but only in the linter. These rules are already enabled by default in the compiler _if_ violations could produce unsafe output.
Work in progress, i'm experimenting with revamping our diagnostic infra. Starting with a better format for representing errors, with an ability to point ot multiple locations, along with better printing of errors. Of course, Babel still controls the printing in the majority case so this still needs more work.
This PR uses the new diagnostic type for most of the error messages produced in our explicit validation passes (`Validation/` directory). One of the validations produced multiple errors as a hack to showing multiple related locations, which we can now consolidate into a single diagnostic.
Uses the new diagnostic infrastructure for this validation, which lets us provide a more targeted message on the text that we highlight (eg "This dependency may be mutated later") separately from the overall error message.
Uses the new diagnostic type for errors created during mutation/aliasing inference, such as errors for mutating immutable values like props or state, reassigning globals, etc.
Minor sytlistic cleanup
This was referenced Jul 12, 2025
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Also fixed up the in-editor error displays |
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