Enable decorators, which are supported by SWC and stage3, just like import_attributes

[NullVoxPopuli]

This PR contains:

• bugfix
• feature
• refactor
• documentation
• other

Are tests included?

• yes (bugfixes and features will not be merged without tests)
• no

Breaking Changes?

• yes (breaking changes will not be merged unless absolutely necessary)
• no

List any relevant issue numbers:

Description

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Name	Status	Preview	Comments	Updated (UTC)
rollup	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Nov 16, 2023 3:31pm

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (01d8c9d) 98.89% compared to head (67070b1) 98.89%.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #5252   +/-   ##
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  Coverage   98.89%   98.89%           
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  Files         232      232           
  Lines        8936     8936           
  Branches     2333     2333           
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  Hits         8837     8837           
  Misses         40       40           
  Partials       59       59           

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[lukastaegert]

Note that to enable decorators, a lot of additional work will be needed:

• You need to extend the converters in convert_ast.rs to add the new Decorator node and extend the existing nodes compatible with https://github.com/estree/estree/blob/master/stage3/decorators.md
• Similarly, you need to extend the decoder in convert-ast.ts to handle the new Decorator node and any additional properties to ensure we produce an ESTree-Compatible AST.
• You also need to extend the AST nodes in /src/ast/ with the new Node/properties.
• We need extensive tests for all situations where we can have decorators. It would be especially important to test for tree-shaking (via form tests) or on the other hand if side effects in decorators are respected (via function tests)