Enhancement: expose ambient module import attributes in the ESTree AST

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Relevant Package

ast-spec

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Description

TypeScript PR #63931 adds import attribute types to ambient module declarations:

declare module "*.css" with { type: "css" } {
  const stylesheet: CSSStyleSheet;
  export default stylesheet;
}

The TypeScript compiler AST now exposes this clause as an optional attributes?: TypeLiteralNode property on ModuleDeclaration.

I propose representing it in typescript-eslint’s ESTree AST as an optional attributes?: TSTypeLiteral property on the applicable string-named TSModuleDeclaration variants:

interface TSModuleDeclaration {
  // existing fields...
  attributes?: TSTypeLiteral;
}

This is a type literal rather than the ImportAttributes node used by import and export declarations.

Expected AST shape:

{
  type: "TSModuleDeclaration",
  id: {
    type: "Literal",
    value: "*.css"
  },
  attributes: {
    type: "TSTypeLiteral",
    members: [
      {
        type: "TSPropertySignature",
        // type: "css"
      }
    ]
  },
  body: {
    type: "TSModuleBlock"
  },
  kind: "module",
  declare: true
}

Additional Info

• Upstream implementation: microsoft/TypeScript#63931
• Upstream issue: microsoft/TypeScript#46135