Port late bound class property declaration emit

[andrewbranch]

I ported this thinking it was related to #1720, but it ended up being something else.

[Copilot]

Pull Request Overview

This PR ports late bound class property declaration emit functionality from the TypeScript compiler. The main goal is to improve how computed property names are handled in declaration files, specifically by preserving the actual computed names instead of falling back to generic index signatures.

• Adds support for tracking computed property name components in IndexInfo structures
• Implements logic to emit individual property declarations for late-bound properties when serializable
• Updates test baselines to reflect improved computed property name handling in declarations

Reviewed Changes

Copilot reviewed 25 out of 25 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
internal/checker/types.go	Adds components field to IndexInfo struct to track computed property names
internal/checker/inference.go	Updates IndexInfo constructor calls to include new components parameter
internal/checker/emitresolver.go	Implements core logic for emitting late-bound property declarations
internal/checker/checker.go	Updates all IndexInfo creation sites and adds computed name detection
internal/ast/ast.go	Adds QuestionToken method for accessing question tokens from various node types
Test baseline files	Updated to reflect improved computed property name preservation

[weswigham]

There's also still the generated type cases to handle through the missing (very similar) logic in createTypeNodesFromResolvedType in the node builder (namely: the missing indexInfoToObjectComputedNamesOrSignatureDeclaration call layer - probably shoulda left that in with a !!! rather than inlining the finished part of the call).