Add support for spec-compliant decorators

[NullVoxPopuli]

Currently Stage 3: https://github.com/tc39/proposal-decorators

Supporting Implementations

• esbuild - repl - implementation
• swc - repl
• babel - https://babeljs.io/docs/babel-plugin-proposal-decorators (version 2023-05)

[dnalborczyk]

https://github.com/acornjs/acorn/blob/e7c91713cd868320e63dbf0b998ce2f9fcb3fa86/acorn/README.md#interface

NOTE: Only 'stage 4' (finalized) ECMAScript features are being implemented by Acorn. Other proposed new features must be implemented through plugins.

[dmail]

I have tried to find a plugin to add support for decorators in acorn but I could not find any.

[NullVoxPopuli]

Stage 4 progress updates: tc39/proposal-decorators#512