Fix template literal types in TypeScript.

[bm-w]

The stanza dealing template_literal_type syntax nodes is too liberal in its capturing of inner types, causing it to capture string_fragment syntax nodes and fail creating edges with an error like:

0: Error executing statement edge @inner.lexical_scope -> @type.lexical_scope at (5775, 3)
     src/stack-graphs.tsg:5775:3:
     5775 |   edge @inner.lexical_scope -> @type.lexical_scope
          |   ^
     in stanza
     src/stack-graphs.tsg:5773:1:
     5773 | (template_literal_type (_)@inner)@type {
          | ^
     matching (template_literal_type) node
     test/types/template-literal-type.ts:2:17:
     2 | type Greeting = `Hello, ${World}!`;
       |                 ^
1: Evaluating edge source
2: Undefined scoped variable [syntax node string_fragment (2, 18)].lexical_scope

Restricting the inner type capture to just template_type syntax node fixes the issue. As of v0.23.2 of the Tree-sitter TypeScript grammar the template_literal_type only allows string_fragment and template_type children, so this fix should be fine. Copious testing (on this repo’s TypeScript test suite and on all of microsoft/vscode) reveals no negative side effects.

[Copilot]

Pull Request Overview

This PR fixes the template literal type parsing by restricting the capture of inner types to just the "template_type" syntax node, addressing an issue where "string_fragment" nodes were incorrectly captured.

• Restricts inner type capture for template literal types
• Adds a test case to verify the change

Files not reviewed (1)

• languages/tree-sitter-stack-graphs-typescript/src/stack-graphs.tsg: Language not supported