Multiple improvements to Quick Info

[ahejlsberg]

Improvements include:

• Show dotted names for members of classes and interfaces.
• Show the resolved overload in calls to overloaded functions and methods.
• Include type arguments in quick info for calls to generic functions and methods.

[Copilot]

Pull Request Overview

This PR enhances Quick Info by displaying dotted member names, resolving specific overloads for calls, and including type arguments for generic calls.

• Differentiate type parameters vs arguments in the printer.
• Adjust hover logic to pass container context, resolve overloads, and show type arguments.
• Simplify signature-to-node building to inline type parameters and expose resolved signatures.

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
internal/printer/printer.go	Emit type arguments when a node is not a declaration
internal/ls/hover.go	Use getNodeForQuickInfo, getSignaturesAtLocation, and pass container to formatting functions
internal/checker/nodebuilderimpl.go	Replace pointer slices with direct slices for type parameters
internal/checker/exports.go	Add GetResolvedSignature to the public Checker interface

Comments suppressed due to low confidence (3)

internal/printer/printer.go:1407

• Consider adding unit tests for emitTypeParameterNode to verify both the type parameter and type argument branches work as intended.

if ast.IsTypeParameterDeclaration(node) {

internal/ls/hover.go:168

• Add tests covering getNodeForQuickInfo behavior for NewExpression, NamedTupleMember, ImportMeta, and JSXNamespacedName cases to ensure correct node selection.

func getNodeForQuickInfo(node *ast.Node) *ast.Node {

internal/ls/hover.go:199

• Introduce unit tests for getSignaturesAtLocation to validate overload resolution logic and proper handling of generic signatures with type parameters.

func getSignaturesAtLocation(c *checker.Checker, symbol *ast.Symbol, kind checker.SignatureKind, node *ast.Node) []*checker.Signature {